diff --git a/package.json b/package.json
index 4754205e..1e862b46 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "openstack-uicore-foundation",
-    "version": "5.0.54",
+    "version": "5.0.58-beta.0",
     "description": "ui reactjs components for openstack marketing site",
     "main": "lib/openstack-uicore-foundation.js",
     "scripts": {
diff --git a/src/components/inputs/dropzone/__tests__/dropzone.test.js b/src/components/inputs/dropzone/__tests__/dropzone.test.js
index 9a1c2497..36d18c6b 100644
--- a/src/components/inputs/dropzone/__tests__/dropzone.test.js
+++ b/src/components/inputs/dropzone/__tests__/dropzone.test.js
@@ -31,13 +31,22 @@ let mockCapturedOptions = {};
 jest.mock('dropzone', () => {
   return jest.fn().mockImplementation((element, options) => {
     mockCapturedOptions = options;
-    return {
+    const dz = {
       options,
       on: jest.fn(),
       off: jest.fn(),
       destroy: jest.fn(() => null),
       getActiveFiles: jest.fn(() => [])
     };
+    // Mimics Dropzone's real Emitter: replays every handler registered via `on`
+    // for that event, in registration order - the same "multiple listeners on
+    // one event" behavior the ontimeout/pollUploadStatus fixes rely on.
+    dz.emit = jest.fn((event, ...args) => {
+      dz.on.mock.calls
+        .filter(([evt]) => evt === event)
+        .forEach(([, handler]) => handler(...args));
+    });
+    return dz;
   });
 });
 
@@ -515,6 +524,142 @@ describe('DropzoneJS - HTTP 202 Polling UX', () => {
       done();
     }, 10);
   });
+
+  /**
+   * Test Case 10: a chunk that times out releases its concurrency slot
+   *
+   * Dropzone's own default xhr.ontimeout (set before the 'sending' handler runs)
+   * still fires 'error', but without wrapping it here onChunkComplete() never
+   * runs, so chunksInFlight never decrements and later chunks stay queued forever.
+   */
+  test('test_dropzone_ontimeout_releases_chunk_slot', () => {
+    const ref = React.createRef();
+
+    render(
+      <DropzoneJS
+        {...defaultProps}
+        ref={ref}
+        onUploadComplete={onUploadCompleteMock}
+        onError={onErrorMock}
+      />
+    );
+
+    const instance = ref.current;
+    const mockFile = { name: 'test.pdf', size: 1024000 };
+    const dropzoneOnTimeout = jest.fn();
+    const mockXhr = {
+      readyState: XMLHttpRequest.DONE,
+      setRequestHeader: jest.fn(),
+      onload: jest.fn(),
+      onerror: jest.fn(),
+      ontimeout: dropzoneOnTimeout,
+      abort: jest.fn()
+    };
+
+    instance.chunksInFlight = 1;
+    getEventHandler(instance, 'sending')(mockFile, mockXhr, { append: jest.fn() });
+
+    mockXhr.ontimeout({});
+
+    expect(instance.chunksInFlight).toBe(0);
+    // Dropzone's own timeout handling (which still reports the error) must still run.
+    expect(dropzoneOnTimeout).toHaveBeenCalledTimes(1);
+  });
+
+  /**
+   * Test Cases 11-13: pollUploadStatus's three failure branches route through the
+   * file-level error channel (dropzone.emit('error', file, message)) instead of
+   * calling onError directly, so the row clears and the consumer is told exactly once.
+   */
+  test('test_dropzone_poll_timeout_emits_a_string_message_and_calls_onError_once', async () => {
+    jest.useFakeTimers({ doNotFake: ['queueMicrotask'] });
+    global.fetch = jest.fn(() =>
+      Promise.resolve({ json: () => Promise.resolve({ status: 'uploading' }) })
+    );
+
+    const ref = React.createRef();
+    render(
+      <DropzoneJS
+        {...defaultProps}
+        ref={ref}
+        onUploadComplete={onUploadCompleteMock}
+        onError={onErrorMock}
+      />
+    );
+
+    const instance = ref.current;
+    const mockFile = { name: 'big.pdf', size: 1024000 };
+    instance.pollUploadStatus('file-timeout', 'https://example.com/upload', mockFile);
+
+    // maxAttempts is 300 at 2s/tick - advance one tick past the ceiling.
+    await jest.advanceTimersByTimeAsync(2000 * 301);
+
+    expect(onErrorMock).toHaveBeenCalledTimes(1);
+    const [message] = onErrorMock.mock.calls[0];
+    expect(typeof message).toBe('string');
+    expect(message).toBe('Upload timed out');
+
+    jest.useRealTimers();
+  }, 20000);
+
+  test('test_dropzone_poll_server_error_status_emits_readable_message_not_object', (done) => {
+    global.fetch = jest.fn(() =>
+      Promise.resolve({
+        json: () => Promise.resolve({ status: 'error', message: 'processing failed' })
+      })
+    );
+
+    const ref = React.createRef();
+    render(
+      <DropzoneJS
+        {...defaultProps}
+        ref={ref}
+        onUploadComplete={onUploadCompleteMock}
+        onError={onErrorMock}
+      />
+    );
+
+    setTimeout(() => {
+      const instance = ref.current;
+      const mockFile = { name: 'test.pdf', size: 1024000 };
+      instance.pollUploadStatus('file-server-error', 'https://example.com/upload', mockFile);
+
+      setTimeout(() => {
+        expect(onErrorMock).toHaveBeenCalledTimes(1);
+        const [message] = onErrorMock.mock.calls[0];
+        expect(message).toBe('processing failed');
+        expect(message).not.toBe('[object Object]');
+        done();
+      }, 2500);
+    }, 10);
+  }, 10000);
+
+  test('test_dropzone_poll_fetch_rejection_emits_readable_message_and_calls_onError_once', (done) => {
+    global.fetch = jest.fn(() => Promise.reject(new Error('network down')));
+
+    const ref = React.createRef();
+    render(
+      <DropzoneJS
+        {...defaultProps}
+        ref={ref}
+        onUploadComplete={onUploadCompleteMock}
+        onError={onErrorMock}
+      />
+    );
+
+    setTimeout(() => {
+      const instance = ref.current;
+      const mockFile = { name: 'test.pdf', size: 1024000 };
+      instance.pollUploadStatus('file-network-error', 'https://example.com/upload', mockFile);
+
+      setTimeout(() => {
+        expect(onErrorMock).toHaveBeenCalledTimes(1);
+        const [message] = onErrorMock.mock.calls[0];
+        expect(message).toBe('Network error');
+        done();
+      }, 2500);
+    }, 10);
+  }, 10000);
 });
 
 describe('DropzoneJS - Progress Bar Monotonicity', () => {
diff --git a/src/components/inputs/dropzone/index.js b/src/components/inputs/dropzone/index.js
index d619fc1e..846c1ab3 100644
--- a/src/components/inputs/dropzone/index.js
+++ b/src/components/inputs/dropzone/index.js
@@ -106,7 +106,7 @@ export class DropzoneJS extends React.Component {
             attempts++;
             if (attempts > maxAttempts) {
                 this.stopPolling(file);
-                this.onError({ message: 'Upload timed out' });
+                this.dropzone.emit('error', file, 'Upload timed out');
                 return;
             }
             try {
@@ -131,11 +131,12 @@ export class DropzoneJS extends React.Component {
                     this.onUploadComplete(data);
                 } else if (data.status === 'error') {
                     this.stopPolling(file);
-                    this.onError(data);
+                    this.dropzone.emit('error', file, data.message || data.error || 'Upload failed');
                 }
             } catch (error) {
                 this.stopPolling(file);
-                this.onError(error);
+                // fetch fail is always connection error
+                this.dropzone.emit('error', file, 'Network error');
             }
         }, 2000);
 
@@ -494,11 +495,19 @@ export class DropzoneJS extends React.Component {
                 _this.onChunkComplete();
                 if (dropzoneOnError) dropzoneOnError(e);
             }
+
+            // Without this wrapper a timed-out chunk never releases its concurrency slot.
+            let dropzoneOnTimeout = xhr.ontimeout;
+            xhr.ontimeout = function(e) {
+                _this.onChunkComplete();
+                if (dropzoneOnTimeout) dropzoneOnTimeout(e);
+            }
         })
 
-        this.dropzone.on('error', (file, message) => {
+        // xhr.status is 0 for a transport failure, vs a real non-2xx server response.
+        this.dropzone.on('error', (file, message, xhr) => {
             console.log(`DropzoneJS::error`, message);
-            this.onError(message);
+            this.onError(message, xhr?.status);
         });
     }
 
diff --git a/src/components/inputs/upload-input-v3/__tests__/dropzone-v3.test.js b/src/components/inputs/upload-input-v3/__tests__/dropzone-v3.test.js
index 3bdae599..a9042f8b 100644
--- a/src/components/inputs/upload-input-v3/__tests__/dropzone-v3.test.js
+++ b/src/components/inputs/upload-input-v3/__tests__/dropzone-v3.test.js
@@ -90,3 +90,43 @@ describe('DropzoneV3 - uploadprogress to React bridging', () => {
     expect(onUploadProgress).toHaveBeenCalledWith(file, 40);
   });
 });
+
+describe('DropzoneV3 - error status forwarding', () => {
+  beforeEach(() => {
+    capturedEventHandlers = null;
+  });
+
+  test('forwards the xhr status from the error event to onFileError', () => {
+    const onFileError = jest.fn();
+    render(
+      <DropzoneV3
+        id="test-dropzone-v3"
+        config={{ postUrl: 'https://example.com/upload' }}
+        djsConfig={{}}
+        onFileError={onFileError}
+      />
+    );
+
+    const file = { name: 'video.mp4' };
+    capturedEventHandlers.error(file, 'Server responded with 0 code.', { status: 0 });
+
+    expect(onFileError).toHaveBeenCalledWith(file, 'Server responded with 0 code.', 0);
+  });
+
+  test('passes undefined status when Dropzone emits error without an xhr (e.g. client-side validation)', () => {
+    const onFileError = jest.fn();
+    render(
+      <DropzoneV3
+        id="test-dropzone-v3"
+        config={{ postUrl: 'https://example.com/upload' }}
+        djsConfig={{}}
+        onFileError={onFileError}
+      />
+    );
+
+    const file = { name: 'huge.mp4' };
+    capturedEventHandlers.error(file, 'File is too big.');
+
+    expect(onFileError).toHaveBeenCalledWith(file, 'File is too big.', undefined);
+  });
+});
diff --git a/src/components/inputs/upload-input-v3/__tests__/upload-input-v3.test.js b/src/components/inputs/upload-input-v3/__tests__/upload-input-v3.test.js
index 59f3b058..3a81bf68 100644
--- a/src/components/inputs/upload-input-v3/__tests__/upload-input-v3.test.js
+++ b/src/components/inputs/upload-input-v3/__tests__/upload-input-v3.test.js
@@ -246,6 +246,47 @@ describe('UploadInputV3', () => {
       expect(screen.getByText(/File is too big/)).toBeInTheDocument();
     });
 
+    test('two failed chunks for the same file collapse into a single error row', () => {
+      render(<UploadInputV3 {...defaultProps} />);
+      act(() => {
+        dropzoneCallbacks.onAddedFile({ name: 'big-file.png', size: 9999999 });
+      });
+      act(() => {
+        dropzoneCallbacks.onFileError({ name: 'big-file.png', size: 9999999 }, 'Server responded with 0 code.', 0);
+      });
+      act(() => {
+        dropzoneCallbacks.onFileError({ name: 'big-file.png', size: 9999999 }, 'Server responded with 0 code.', 0);
+      });
+      expect(screen.getAllByText('big-file.png')).toHaveLength(1);
+      expect(screen.queryByText('Server responded with 0 code.')).not.toBeInTheDocument();
+      expect(screen.getAllByText('Upload interrupted by a connection error. Please retry.')).toHaveLength(1);
+    });
+
+    test('a status-0 connection failure shows a readable message instead of the raw "Server responded with 0 code."', () => {
+      render(<UploadInputV3 {...defaultProps} />);
+      act(() => {
+        dropzoneCallbacks.onFileError({ name: 'video.mp4', size: 9999999 }, 'Server responded with 0 code.', 0);
+      });
+      expect(screen.getByText('Upload interrupted by a connection error. Please retry.')).toBeInTheDocument();
+      expect(screen.queryByText('Server responded with 0 code.')).not.toBeInTheDocument();
+    });
+
+    test('a fetch-rejection during status polling ("Network error") shows the same readable connection message', () => {
+      render(<UploadInputV3 {...defaultProps} />);
+      act(() => {
+        dropzoneCallbacks.onFileError({ name: 'video.mp4', size: 9999999 }, 'Network error');
+      });
+      expect(screen.getByText('Upload interrupted by a connection error. Please retry.')).toBeInTheDocument();
+    });
+
+    test('a real non-zero-status server error still shows the server-provided message', () => {
+      render(<UploadInputV3 {...defaultProps} />);
+      act(() => {
+        dropzoneCallbacks.onFileError({ name: 'video.mp4', size: 9999999 }, 'File type not allowed', 415);
+      });
+      expect(screen.getByText('File type not allowed')).toBeInTheDocument();
+    });
+
     test('dismissing an error removes it from the view and restores the dropzone', () => {
       const { container } = render(<UploadInputV3 {...defaultProps} />);
       act(() => {
diff --git a/src/components/inputs/upload-input-v3/dropzone-v3.js b/src/components/inputs/upload-input-v3/dropzone-v3.js
index c38495b7..f351d770 100644
--- a/src/components/inputs/upload-input-v3/dropzone-v3.js
+++ b/src/components/inputs/upload-input-v3/dropzone-v3.js
@@ -63,9 +63,9 @@ export const DropzoneV3 = ({
       if (onFileCompleted) onFileCompleted(file);
       if (eventHandlers.success) eventHandlers.success(file);
     },
-    error: (file, message) => {
-      if (onFileError) onFileError(file, message);
-      if (eventHandlers.error) eventHandlers.error(file, message);
+    error: (file, message, xhr) => {
+      if (onFileError) onFileError(file, message, xhr?.status);
+      if (eventHandlers.error) eventHandlers.error(file, message, xhr?.status);
     },
   };
 
diff --git a/src/components/inputs/upload-input-v3/index.js b/src/components/inputs/upload-input-v3/index.js
index 8e2d474c..bb9a97d6 100644
--- a/src/components/inputs/upload-input-v3/index.js
+++ b/src/components/inputs/upload-input-v3/index.js
@@ -205,19 +205,29 @@ const UploadInputV3 = ({
     }));
   }, [value]);
 
-  const handleFileError = useCallback((file, message) => {
+  const handleFileError = useCallback((file, message, status) => {
     setUploadingFiles(prev => {
       const entry = prev.find(f => f.name === file.name && f.size === file.size);
       if (entry?.previewUrl) URL.revokeObjectURL(entry.previewUrl);
       return prev.filter(f => !(f.name === file.name && f.size === file.size));
     });
-    // Dropzone turns a cancelled upload into an error carrying dictUploadCanceled. A cancel
-    // is not a failure to report back to the user - the row just goes away. 'canceled' is the
-    // value of Dropzone.CANCELED, matched as a literal so this does not depend on the
-    // Dropzone module being loaded here; _userCanceled also covers files Dropzone never got
-    // to mark, such as one removed before its upload reached the UPLOADING state.
+    // 'canceled' is the value of Dropzone.CANCELED, matched as a literal so this does not depend on the
+    // Dropzone module being loaded here; _userCanceled is when removed before its upload reached the UPLOADING state.
     if (file._userCanceled || file.status === 'canceled') return;
-    setErrorFiles(prev => [...prev, { name: file.name, size: file.size, message }]);
+
+    // status 0 means the request never got a real server response (connection dropped/timed
+    // out) - Dropzone's own message for that case is "Server responded with 0 code.", which
+    // is not something a user can act on.
+    const displayMessage = status === 0 || message === 'Network error'
+      ? T.translate('upload_input_v3.network_error')
+      : message;
+
+    setErrorFiles(prev => {
+      const existingIndex = prev.findIndex(f => f.name === file.name && f.size === file.size);
+      const entry = { name: file.name, size: file.size, message: displayMessage };
+      if (existingIndex === -1) return [...prev, entry];
+      return prev.map((f, i) => (i === existingIndex ? entry : f));
+    });
   }, []);
 
   const handleDismissError = useCallback((file) => {
diff --git a/src/i18n/en.json b/src/i18n/en.json
index a8da85c6..4ca2c9ff 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -186,7 +186,8 @@
       "drag_and_drop": "or drag and drop",
       "see_preview": "See Preview",
       "preview_file": "Preview file",
-      "complete": "Complete"
+      "complete": "Complete",
+      "network_error": "Upload interrupted by a connection error. Please retry."
   },
   "grid_filter": {
     "filter_by": "Filter by ",