Editor freezes when entering the Play Mode after code changes

Reproduction steps:
1. Open the attached “BugRepro” project
2. Open the “Assets/Scenes/Demo.unity” Scene
3. Open the “Assets/Scripts/Camera/IsometricCameraController.cs” script
4. Comment out 30-48 lines
5. Save the script (CTRL+S)
6. Enter the Play Mode
7. Exit the Play Mode
8. Observe the Editor

Expected result: The Editor does not freeze
Actual result: Editor freezes

Reproducible with: 6000.0.45f1

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Notes:

• Not reproduced by CQA
• If the Editor does not freeze, try uncommenting the same lines and repeat steps 5–7