Loading popup is shown again when clicking an already selected AI generated asset

Steps to reproduce:

1. Create a Unity project
2. Click the "AI" button
3. Click "Agree and install Unity AI"
4. Go to AI > Generate New > 3D Model
5. Enter any valid prompt and change Count to 2

1. Click Generate
2. Once generated, click on one generated model thumbnail once and wait for it to finish loading
3. With the same model still selected, click the same thumbnail again
4. Observe the selection behavior and Editor responsiveness

Actual results: Clicking an already selected generated asset re-runs the full selection/loading process each time, showing the “Hold on” popup or spinner again and causing noticeable lag, particularly for 3D Models

Expected results: Clicking an already selected generated asset does not re-trigger heavy loading; no “Hold on” popup or loading spinner appears again

Reproducible with versions: 1.6.0-pre.1, 2.0.0-pre.1 (6000.4.0b11, 6000.5.0a8)

Tested on (OS): Windows 11

Notes:

• The issue is most evident with 3D Model, Animation and Cubemap generations where each click on the already selected result shows a “Hold on” popup and momentarily blocks interaction. Material, Sound, Sprite, Texture don't exhibit the same behavior (likely due to asset size)