How to reproduce:
1. Open the ‘AssetBundleMaterialTest.zip' project
2. Open the 'SampleScene’ scene
3. In the Hierarchy, select the Main Camera and in the "Test Scene" component, click the "Build AssetBundles" button to build the AssetBundles
4. Enter Play Mode
5. In the Game view, press the "02" button
6. Observe the Game view

Actual result: When pressing the "02" button, the Sprite correctly switches to the "02" variant texture, but the Material's texture reference does not change to the "02" variant
Expected result: When pressing the "02" button, both the Sprite displayed via UI Image and the texture assigned to the Material use the "02" variant texture

Reproducible with: 2022.1.0a5, 2022.3.69f1, 6000.0.64f1, 6000.3.1f1, 6000.4.0b1, 6000.5.0a3

Reproducible on: macOS 26.0.1 (M1 Max)
Not reproducible on: No other environments tested

Notes:
This issue occurs under the following conditions:
- The texture’s Texture Type is set to "Sprite (2D and UI)"
- The same texture asset is referenced both by a Sprite and by a Material
- The Material is included in a different AssetBundle from the texture