How to reproduce:
1. Create a new 2D Unity project and install the AI Packages
2. In the Project window, right-click -> Create -> 2D -> Sprites -> Generate Sprite
3. In the model field, click "Change" and type "Flux" into the search 
4. Observe the previews of some models

Expected results: All models have previews
Actual results: Some models have only cover image

Reproducible with: 1.0.0-pre.20 (6000.4.0b4)

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

Notes:
- Affects "Flux.1 Pro", "Game Environment Items (Flux)", "Game UI Elements (Flux)"
- Game Items (Flux) and Game Icons 3D (Flux) have only one preview