Steps to reproduce:
1. Create new Unity project using Universal 2D Template
2. Import any Tile to the project or use from provided Samples (Package Manager > 2D Tilemap Extras > Waterfall Animated Tile)
3. Open Tile Palette window
4. Drag the imported Tile to the Tile Palette window
5. Observe the Tile Palette window with Tile dragged in
Actual results: Tile is not rendered in the Tile Palette window and is shown in black color
Expected results: Tile is rendered in the Tile Palette window and is shown with its colors
Reproducible with versions: 6000.5.0b6 (81a3023a9d59), 6000.6.0a4
Not reproducible with versions: 6000.4.5f1, 6000.5.0b5 (68fb1ff6adb3)
Tested on (OS): macOS Silicon Tahoe 26.4.1