Serialized custom types break the inspector!

[meredoth]

This seems to be related to a known serialization bug that occurs in certain Unity versions, the “GetName can only be called from the main thread”. Here is the related issue in the tracker:

Unity IssueTracker - Errors are thrown and Inspector's UI element is not...

These are the threads where the same bug is mentioned:

Please tell me about the error related to the List

I’m a beginner when it comes to Unity. [スクリーンショット 2025-09-27 003153] Displaying the list for shuffling the card deck in the editor returns this error. UnityException: GetName can only be called from the main thread. Constructors and field initializers will be executed from the loading thread when loading a scene. Don’t use this function in the constructor or field initializers, instead move initialization code to the Awake or Start function. UnityEngine.Object.GetName () (at :0) UnityEng…

Array kills the inspector

When I use an array, it breaks the fields in the Inspector and throws errors. I tested it on different Unity 6+ versions and devices, and the same issue happens everywhere — the fields in the Inspector disappear. If anyone has faced this, please tell me how to fix it or what could be the problem. Example error: UnityException: GetName can only be called from the main thread. [image]

Did the update, and now a simple project has run-time errors

[image]

Try using a version listed as “not reproducible” in the issue tracker. For me, the bug doesn’t occur in 6000.3.0b2, 6000.3.0b3 and 6000.3.0b4 which I tested.