Reproduction steps:
1. Open the attached “BugRepro” project
2. Open the “main” Scene
3. Enter the Play Mode
4. Observe the Console window

Expected result: No errors are printed out
Actual result: Error regarding Graphics.Blit is printed out: {{Graphics.Blit material "mat" uses dest texture "rt1" as input in pass (0), it's an undefined behaviour. Consider using double buffering.}}

Reproducible with: 2021.3.23f1, 2021.3.39f1, 2022.3.31f1, 6000.0.4f1
Not reproducible with: 2021.3.22f1

Reproducible on: Windows 10
Not reproducible on: No other environment tested