How to reproduce:
1. Open the attached “IN-136862” project
2. Open the scene “SampleScene”
3. Select the “Brick_Copy” texture
4. In Texture Import Settings, enable “Generate MipMap”
5. Set Aniso Level to 16 and click “Apply”
6. Disable “Generate MipMap” and click “Apply”
7. Observe the Game view

Actual result: Disabling “Generate MipMap” greys out the Aniso Level slider, but the previously set Aniso Level still applies
Expected result: When the Aniso Level slider is disabled and greyed out, previous values are not applied

Reproducible with: 2023.1.0a1, 6000.0.71f1 (907bc2d768b5), 6000.3.12f1, 6000.4.1f1, 6000.5.0b1 (c1f81ff5b082), 6000.6.0a1 (7dc703ab9bd8)

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