Reproduction steps:
1. Open the attached “UnityUI.zip” project
2. Open the “SampleScene” scene (Assets > Scenes)
3. In the Scene view click on any Canvas UI element
Expected result: The clicked-on element gets selected
Actual result: A random Canvas element gets selected
Reproducible with: 6000.0.3f1, 6000.0.8f1
Not reproducible with: 2021.3.40f1, 2022.3.35f1, 6000.0.2f1
Reproducible on: Windows 11
Not reproducible on: No other environment tested