How to reproduce:
1. Open the attached “IN-120157” project
2. Open the “SampleScene”
3. Enter Play mode
4. Observe the Console window
5. Exit Play mode
6. In the Hierarchy window, select the “New Sub Scene”
7. Uncheck “Auto Load Scene” in the Inspector
8. Enter Play mode
9. Observe the Console window
Expected result: No errors are shown in the Console in the 4th and 9th steps
Actual result: In the 9th step, a NullReferenceException is thrown in the Console every frame
Reproducible with: 1.2.0 (6000.2.12f1), 1.4.0-pre.3 (6000.0.62f1, 6000.2.13f1, 6000.3.0f1, 6000.4.0a5, 6000.5.0a1)
Not reproducible with: 1.4.3 (6000.0.62f1, 6000.2.13f1, 6000.3.0f1, 6000.4.0a5, 6000.5.0a1)
Fixed in: 1.4.0-pre.4 (6000.2.12f1)
Reproducible on: Windows 11
Not reproducible on: No other environments tested