Reproduction steps:
1. Open the attached “IN-126774” project
2. Open the “Scenes/AutosizeBugScene.unity” Scene
3. Observe the “WD% 8” TMP GameObject (The red text)

Actual result: The TMP UGUI object fails to correctly Auto Size to fit the enclosing text boundary box/frame
Expected result: The TMP UGUI Text gets Auto Sized properly

Reproducible with: 2022.1.0a3, 2022.3.70f1, 6000.0.64f1, 6000.3.3f1, 6000.4.0b3, 6000.5.0a4
Not reproducible with: 2021.3.0f1, 2021.3.54f1

Reproducible on: macOS 14.7.6 (by reporter), macOS 26.2
Not reproducible on: No other environments tested

Notes:
- There are many other percentages that also fail, such as 1, 2, 3, 4, 6, 8, 11, 12, 13, 19, 21, 22, 24, 26, 29, 32, 35, etc.
- When the Auto Size fails, the Console reports this message: "Auto Size Iteration Count: 100. Final Point Size: 36"