Reproduction steps:
1. Open the user's attached “repro project”
2. Open “SampleScene”
3. Open “MainGameUI.uxml”
4. Enter Play Mode
5. Observe Game view
Expected result: two red blocks with labels inside appear
Actual result: two red blocks with labels inside do not appear
Reproducible with: 2023.2.0a19, 2023.2.0b5
Not reproducible with: 2022.3.7f1, 2023.1.9f1, 2023.2.0a18
Couldn’t test with: 2021.3.29f1 (console errors)
Reproducible on: macOS Ventura 13.2.1 (Intel), Windows 11 (by the reporter)
Not reproducible on: No other environment tested