How to reproduce:
1. Open the attached “anchor.zip” project
2. Enter “SampleScene” Scene (Assets > Scenes)
3. In the Hierarchy window expand “Canvas” GameObject and select “Text (TMP)” GameObject
4. In the Inspector window open “Extra Settings”
5. Change any of the “Margins” values
6. Observe the result

Expected result: “Margins” values can be set to any values
Actual result: “Margins” values are set to specific values and can’t be changed

Reproducible with: 2023.2.0a14, 2023.2.0b5
Not reproducible with: 2021.3.29f1, 2022.3.7f1, 2023.1.9f1, 2023.2.0a13

Reproduced on: macOS 13.4.1 (Intel)
Not reproducible on: No other environment tested

Note: not reproducible with default “Margins” values “0.5”