How to reproduce:
1. Open the user-attached project “BUG-UIToolkit-TransitionAfterRemove”
2. Open the “SampleScene” scene
3. Enter the Play Mode and press any key
4. Observe the Console
Expected result: There are no ArgumentNullException errors
Actual result: The is an ArgumentNullException error
Reproducible with: 2021.3.29f1, 2022.3.6f1, 2022.3.7f1, 2023.1.5f1, 2023.1.8f1, 2023.2.0a22, 2023.2.0b4
Not reproducible with: 2021.3.28f1, 2022.3.5f1, 2023.1.4f1, 2023.2.0a21
Reproducible on: Windows 11 Pro