Reproduction steps:
1. Open the attached “ScriptableObjectBug.zip” project
2. Open the “Assets/Scenes/SampleScene.unity“ Scene
3. Select the “Scripts” GameObject in the Hierarchy window
4. Expand the "Scriptable Objects" array in the Inspector window
5. Collapse the "Scriptable Objects" array in the Inspector window
6. Enter the Play Mode
7. Exit the Play Mode
8. Expand the "Scriptable Objects" array again in the Inspector window
9. Observe the Console window

Expected result: No errors are thrown
Actual result: “InvalidOperationException: EnsureRunningOnMainThread can only be called from the main thread” errors are thrown

Reproducible with: 6000.0.32f1

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

Note: Not reproduced by CQA