How to reproduce:
1. Open the attached “IN-128162” project
2. Open the “SampleScene”
3. In the “AtlasTest” folder, select the “MenuUI” asset
4. In the Inspector, change the “Padding” field to 2 and click “Apply”
5. Observe the Scene/Game view

Actual result: There are artifacts on the Sprite
Expected result: No artifacts are visible on the Sprite

Reproducible with: 6000.3.2f1, 6000.4.0a1, 6000.4.0b2, 6000.5.0a3
Not reproducible with: 6000.0.64f1, 6000.3.0a6

Reproducible on: macOS 26.1 (M1 Pro)
Not reproducible on: No other environments tested

Notes:
- Once the issue has been reproduced, the issue will persist if the project is downgraded to an older version and requires generating the Sprite Atlas again. This can be done by changing “Padding” to 4, generating the atlas, changing over the setting back to 2 and generating once more
- The issue reproduces with “Padding” set to 2, other options do not produce artifacts