How to reproduce:
1. On HoloLens 2 "Remove All Holograms" to clear the tracking data
2. Open the attached project "My project.zip"
3. Build And Run the project on HoloLens 2
4. Observe that spatial meshes are visible
5. Cover HoloLens 2 sensors
6. Go to another room
7. Uncover HoloLens 2 sensors

Expected results: Spatial meshes are visible
Actual results: Spatial meshes are not visible

Reproducible with: 1.7.0 (2022.3.2f1, 2023.1.1f1, 2023.2.0a20), 1.8.2 (2022.3.9f1, 2023.1.13f1, 2023.2.0b9, 2023.3.0a5)
Could not test with: 2021.3.30f1 (spatial meshes are not visible from the start)

Reproducible on: HoloLens 2
Not reproducible on: No other environment tested

Notes: The issue is resolved by using "{{xrInputSubsystem.TrySetTrackingOriginMode(TrackingOriginModeFlags.Unbounded);}}"