Result of useXRMeshes is sometimes empty

[acrilique]

I've only come up with this issue with the Meta Quest 3. To reproduce:

0. Ensure you have gone through MQ3's Room Detection and you have at least 1 mesh labeled "screen" in your room.
1. Open this sandbox in the MQ3
2. Enter AR session
3. Wait to see loaded meshes
4. Take off headset (without exiting AR session first)
5. Wait for a few seconds (between 10-30)
6. Put on headset again
7. Meshes array might be empty. Repeating steps 4-6 might cause it to get populated again.