Error indicating that the Text Asset Importer hasn't been disposed properly is logged when switching Importer Type in a Focused Inspector

Steps to reproduce:

1. Open any Project
2. Add the attached folder to your Project's Packages folder
3. In the Project Browser select the "package.json" that's under the "ff" directory in your Packages folder
4. Click on the kebab menu icon in the top right corner of the Inspector and choose "Properties..."
5. In the Inspector switch the Importer type to Text

Actual results: Error "The previous instance of UnityEditor.TextScriptImporterEditor has not been disposed correctly. Make sure you are calling base.OnDisable() in your AssetImporterEditor implementation.
UnityEditor.EditorGUI/PopupCallbackInfo:SetEnumValueDelegate (object,string[],int)" is logged in the Console

Expected results: No errors are logged when switching Importer types and a focused Inspector is opened

Reproducible with versions: 6000.0.65f1, 6000.2.15f1, 6000.3.4f1, 6000.4.0b4, 6000.5.0a4

Tested on (OS): Windows 11