GameObject appears as "deleted gameobject" in Hierarchy when importing a model using a custom script

How to reproduce:
1. Open attached project "IN-121121"
2. Open "LoadModelFromZipFile" Scene
3. Enter Play Mode
4. In Game View, press "Load Model"
5. Select the provided "IN-121121_sampleModel.zip" file and press Open
6. Observe Hierarchy
7. Select "deleted gameobject" in Hierarchy
8. Observe Console

Expected result: GameObject name is set to the filename and selecting it in the Hierarchy does not produce any errors
Actual result: GameObject shows up as "deleted gameobject" and clicking on it produces errors in the Console

Reproducible with: 2023.2.0a10, 6000.0.61f1, 6000.2.10f1, 6000.3.0b8, 6000.4.0a3
Not reproducible with: 2023.2.0a9

Reproducible on: Windows 10 (by user), Windows 11
Not reproducible on: No other environments tested

Notes:

• issue also reproduces with other models
• custom script is part of "Lightweight FBX Importer" third-party package
• exiting Play Mode or closing the Editor after interacting with the "deleted gameobject" results in the Editor crashing on "Coroutine::CleanupCoroutineGC" and "Object::SetCachedScriptingObject"
• "ArgumentException: GCHandle value belongs to a different domain" Error is thrown when selecting the "deleted gameobject" in Hierarchy
• "SerializedObjectNotCreatableException: Object at index 0 is null" Error is thrown repeatedly when selecting the "deleted gameobject" in Hierarchy
• "InvalidCastException: Specified cast is not valid." Error is thrown repeatedly when selecting the "deleted gameobject" in Hierarchy