Reproduction steps:
1. Open the attached “Test Project” project
2. Select the Scriptable Singleton (Tests > Select MyScriptableSingleton)
3. Observe the Inspector window
Expected result: The “Object Hide Flags” is set to “51” and the fields are editable
Actual result: The “Object Hide Flags” is set to “61” and the fields are not editable
Reproducible with: 2022.3.2f1, 2023.1.1f1, 2023.2.0a20
Couldn’t test with: 2021.3.27f1 - Different structured “MyScriptableSingleton” Asset is created, without “Object Hide Flags”
Reproducible on: Windows 10
Note: After reloading the project “UserSettings/MyScriptableSingleton.asset” is created and when you repeat the reproduction steps, you can edit all the fields