Reproduction steps:
1. Open the attached "case_1325200_URP.zip" project (or "case_1325200_HDRP.zip")
2. Load the "SampleScene"
3. Select "Main Camera" in the Hierarchy window
4. Make sure the Projection is set to "Orthographic", Clipping Planes Near to "0" and Target Eye to "Both" in the Inspector window
5. Enter Play mode
6. Observe the Console window

Expected result: no errors appear in the Console window
Actual result: the Console window is being spammed with errors

Reproduced with: 7.5.3 (2019.4.23f1), 10.4.0 (2020.3.2f1), 11.0.0 (2021.1.1f1), 12.0.0 (2021.2.0a11)
Could not test with 2018.4 (no XR SDK package)

Error messages:
- Assertion failed on expression: 'IsMatrixValid(matrix)'
- Assertion failed on expression: '!camera.GetOrthographic()'
- Screen position out of view frustum (screen pos 672.000000, 0.000000, 145.720001) (Camera rect 672 0 672 1600)

Notes:
- Reproducible with URP and HDRP
- Tested with Oculus and Unity Mock HMD plug-in providers