Reproduction steps:
1. Open the attached “BugRepro” project
2. In the Project window, open the “Assets/Test.prefab“ prefab
3. In the Scene View, make sure “Auto Save” is enabled
4. In the Hierarchy window, select the “Test” GameObject
5. In the Inspector window, in the “Some Text” field write anything
6. Exit the Prefab edit mode
7. In the Project window, select the “Assets/Test.prefab“ prefab
8. Observe the same “Some Text” field

Expected result: The “Some Text” field is properly saved with the text written into it
Actual result: The “Some Text” field is clipped with only the first character being saved

Reproducible with: 2022.2.0a9, 2022.3.9f1, 2023.1.12f1, 2023.2.0a13
Not reproducible with: 2021.3.30f1, 2022.2.0a8
Fixed in: 2023.2.0a14

Reproducible on: Ubuntu 23.04
Not reproducible on: Windows 10 Pro 22H2