How to reproduce:
1. Open the attached “IN-144332” project
2. Select the "New Sprite Atlas" in the Project window
3. Click “Pack Preview” in the Inspector window
4. Observe the preview in the Inspector window
Actual result: Sprites are not tiled correctly and spill out, forcing double-sized textures
Expected result: Sprites fit nicely into the preview
Reproducible with: 6000.3.17f1, 6000.4.10f1, 6000.5.0a6, 6000.5.0b11, 6000.6.0a3
Not reproducible with: 6000.0.0f1, 6000.0.76f1, 6000.5.0a5, 6000.6.0a6
Fixed in: 6000.6.0a4 (77e2e2eea1be)
Reproducible on: Windows 11
Not reproducible on: No other environments tested