1. Open the attached “IN-113136” project
2. Open the “SampleScene“
3. In the Hierarchy select Canvas → Image -> Text(TMP) GameObject
4. In the Inspector, In the “Rect Transform” component adjust the Width value by dragging it back and forth within the 370 - 374 range
5. Observe the Game window

Expected result: An empty line does not appear
Actual result: An empty line appears

Reproducible with: 2023.3.0a14, 6000.0.58f1, 6000.2.6f1, 6000.3.0b3, 6000.4.0a1
Not reproducible with: 2021.3.56f1, 2022.1.0a5, 2022.3.66f1, 2023.3.0a13

Reproducible on: macOS 15.3.2 (24D81) (M1 Max)
Not reproducible on: No other environments tested

Note: reproducible in Player