System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71
Blender Version
Broken: version: 2.92.0 Beta, branch: master, commit date: 2021-02-11 16:22, hash: rB314525b8cfae
Short description of error
Some modifiers such as Bevel and Triangulate cause UV's in the Image Editor to disappear.
Exact steps for others to reproduce the error
- With the default scene, switch to the Texture Paint workspace.
- Notice the UV's in the Image Editor
- Give the default cube a Bevel or Triangulate modifier
- Update the Image Editor by zooming in or out or toggling overlays
- Notice how the UV's are no longer shown
On a similar note but not necessarily related to this bug (though maybe it's a clue?), it's interesting that refreshing the image editor in some way is needed to update the UV display in cases where it does work (such as when adding a subdiv modifier) but that is not true of the UV editor with Modified Edges enabled where the feedback is immediate.