How to reproduce:
1. Create a new Unity project using the BuiltIn Template
2. Enable XR Plugin Management and select OpenXR on the PC platform
3. Set Stereo Rendering Mode to Single-pass
4. Create a simple scene with a cube using the standard shader
5. Enter Play mode
6. Observe the Game View
Expected result: Cube is visible in the Game View
Actual result: Cube is not visible in the Game View
Reproducible with: 6000.0.64f1 (d4299b69b02d), 6000.0.65f1, 6000.1.0a2, 6000.3.2f1, 6000.4.0b3, 6000.5.0a4
Not reproducible with: 2023.1.0a1, 6000.0.63f1 (9438f9b77a46), 6000.1.0a1
Reproducible on: Windows 11 Enterprise
Not reproducible on: No other environments tested
Reproducible on devices:
Oculus Quest 2 (Quest 2), CPU: Snapdragon XR2, GPU: Adreno 650
Workaround:
Switch to Multi-pass rendering
Enable the Frame Debugger