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

Duplicate

Duplicate in 6000.6.X

Votes

0

Found in

6000.0.65f1

6000.2.15f1

6000.3.4f1

6000.4.0b4

6000.5.0a4

6000.6.0a1

Issue ID

UUM-131915

Regression

No

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

Asset Importers

-

Jan 09, 2026

Steps to reproduce:

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

This is a duplicate of issue #UUM-131829

Error indicating that Importer has not been disposed properly is logged when switching to or from the Texture Importer type in a Focused Inspector

Resolution Note:

Thank you for reporting a bug to Unity.

We have reviewed the issue and found it is a duplicate of an existing bug already logged in our system. To keep things organized and ensure the issue is properly prioritized, we have linked your report to the original case.

We will now close this report as a duplicate, but the original bug remains open and under review. Your input has been noted and helps us better understand the impact of the issue. If anything changes regarding its severity or impact, please let us know.

Thank you for helping us improve Unity!
Resolution Note (6000.6.X):

Thank you for reporting a bug to Unity.

We have reviewed the issue and found it is a duplicate of an existing bug already logged in our system. To keep things organized and ensure the issue is properly prioritized, we have linked your report to the original case.

We will now close this report as a duplicate, but the original bug remains open and under review. Your input has been noted and helps us better understand the impact of the issue. If anything changes regarding its severity or impact, please let us know.

Thank you for helping us improve Unity!

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