Custom effect flickers when resizing Scene and Game views

Steps to reproduce:
1. Open the user’s attached project
2. Open Assets/Scenes/SampleScene.unity
3. Attach Scene and Game views side by side
4. Resize Scene and Game views (“flicker.mp4“)

Expected result: Flickering doesn’t appear in the Scene and Game views
Actual result: Flickering does appear in the Scene and Game views

Reproducible with: 12.0.0 (2022.1.0a1), 13.1.8 (2022.1.9f1), 14.0.3 (2022.2.0b1), 15.0.0 (2023.1.0a3)
Not reproducible with: 12.1.7 (2021.3.7f1)
Couldn’t test with: 10.9.0 (2020.3.37f1) (couldn’t resolve console error)

Reproducible on: Windows 10