Reproduction steps:
1. Open the attached “IN-108833.zip” project
2. Open the “bug_repro” Scene
3. Enter Play mode
4. Move around in the Game view with left mouse button
5. Press “Space” on the keyboard 5-10 times (or however many it takes to reproduce)
6. Observe the Game view

Expected result: No frame rate drop or artefacts are visible
Actual result: Frame rate drops and white cube/block artefacts are visible

Reproducible with: 2023.1.0b1, 6000.0.54f1, 6000.1.13f1, 6000.2.0b10, 6000.3.0a3

Reproducible on: Windows 10 (user reported), Windows 11
Not reproducible on: No other environment tested

Notes:
- Pressing “Space” switches between Raytrace and Pathtrace volumes and the Area Light gets toggled with the Pathtracing volume
- To make the reproduction faster, move the camera around and press space frantically
- When there is both Directional and Area Light present in the scene the glitch doesn't happen, only when just Directional Light is present
- Re-enabling the Area Light manually when the glitch is visible will clear the glitch and restore framerate
- Also reproducible in the Player
- In the 2023.1.0b1 version could only observe the performance drop, but not the artefacts