How to reproduce:
1. Create a new 2D Unity project and import the attached "test.aseprite" file
2. Select the imported Asset in the Project window
3. In the Inspector, under the "Layer Import", change the "Pivot Alignment" field
4. Press "Ctrl + Z"/ "Command + Z" to revert change and observe ther esults

Expected results: The change is reverted
Actual results: The change is not reverted

Reproducible with: 6000.0.66f1, 6000.3.4f1, 6000.4.0b5, 6000.5.0a5

Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested

Notes:
- The change is added to the change history but undoing it doesn't change the value
- Despite the fact that the value is not changed, the Asset becomes not dirty