displaying a chat message from within a chat receive event causes an error

[Yedelo]

    @Subscribe
    public void onChat(ChatEvent.Receive event) {
        if (event.getFullyUnformattedMessage().contains("secretyedelcode")) {
            Platform.compatibility().displayChatMessage("Above 255");
        }
    }

[07:42:27] [Render thread/ERROR]: Failed to handle packet ClientboundSystemChatPacket[content=empty[siblings=[literal{[OWNER] }[style={color=#FFFF55,!bold,!italic,!underlined,!strikethrough,!obfuscated}], literal{[MVP}[style={color=#55FFFF,!bold,!italic,!underlined,!strikethrough,!obfuscated}], literal{+}[style={color=#FFAA00,!bold,!italic,!underlined,!strikethrough,!obfuscated}], literal{] Yedel}[style={color=#55FFFF,!bold,!italic,!underlined,!strikethrough,!obfuscated}], literal{: secretyedelcode}[style={color=#FFFFFF,!bold,!italic,!underlined,!strikethrough,!obfuscated}]]], overlay=false], disconnecting
java.lang.NullPointerException: Cannot read field "cancelled" because "this.ocfg$chatEvent" is null
	at knot//net.minecraft.client.gui.components.ChatComponent.ocfg$post(ChatComponent.java:1669)
	at knot//net.minecraft.client.gui.components.ChatComponent.handler$bim000$oneconfigv1$chatReceiveCallback(ChatComponent.java:1615)
	at knot//net.minecraft.client.gui.components.ChatComponent.addMessage(ChatComponent.java)
	at knot//net.minecraft.client.gui.components.ChatComponent.addServerSystemMessage(ChatComponent.java:281)
	at knot//net.minecraft.client.multiplayer.chat.ChatListener.handleSystemMessage(ChatListener.java:232)
	at knot//net.minecraft.client.multiplayer.ClientPacketListener.handleSystemChat(ClientPacketListener.java:1051)
	at knot//net.minecraft.network.protocol.game.ClientboundSystemChatPacket.handle(ClientboundSystemChatPacket.java:25)
	at knot//net.minecraft.network.protocol.game.ClientboundSystemChatPacket.handle(ClientboundSystemChatPacket.java:11)
	at knot//net.minecraft.network.PacketProcessor$ListenerAndPacket.handle(PacketProcessor.java:55)
	at knot//net.minecraft.network.PacketProcessor.processQueuedPackets(PacketProcessor.java:38)
	at knot//net.minecraft.client.Minecraft.runTick(Minecraft.java:1343)
	at knot//net.minecraft.client.Minecraft.run(Minecraft.java:991)
	at knot//net.minecraft.client.main.Main.main(Main.java:248)

this kicks from the server