Shadowed Cove lights cause oscillations

[ColinTimBarndt]

Summary

The interior lights in Shadowed Cove appear to be causing stutter with frame times of 7 - 30ms.

Reproduction Steps

1. Open Shadowed Cove
2. Go inside
3. Disable lights (see attachments)

Expected / actual

Expected: No stutter

Actual:

Logs / attachments

The offending slot hierarchies that contain lights: