How to reproduce:
1. Create an empty HDRP project
2. Go to Window -> Rendering -> Graphics Compositor
3. Check the "Enable Compositor" checkbox
4. Make sure to have a Camera SubLayer
5. Change the "Output Camera" to "Main Camera (Camera)"
6. Observe the window

Expected results: There are no visual artifacts
Actual results: There are severe visual artifacts that might make the window unusable, sometimes other windows have the same artifacts

Reproducible with: 2021.3.45f1, 2022.3.50f1, 6000.0.23f1

Reproducible on: macOS Sequoia 15.0 (M1), MacOS Sonoma 14.5 (M1 Max), MacOS Sonoma 14.6.1 (M3 Pro)
Not reproducible on: Windows 11, Windows 10, MacOS Sonoma 14.6.1 (Intel)

Note:
* In older versions flickering mostly occurs in sub menus and Inspector

* Reproduction seems to differ depending on the chip, the window flashing black on M3 chip and being "pixelated" and flashing rapidly on M1 chips (see attached videos)
* Sometimes the actual behavior turns into expected when the window looses focus
* Warnings were observed being spammed in 6000.0.10f1 on Intel Macs (visual behavior was good) (see image)