Reproduction steps:
1. Open the attached “IN-104532_PhysicsBug.zip“ project
2. Open the “Assets/Scenes/SampleScene.unity“ Scene
3. Enter the Play Mode
4. Select the “Square“ GameObject in the Hierarchy
5. Observe the Transform’s Position values in the Inspector
6. Exit Play Mode
7. Repeat steps 3-5

Expected result: The transform position of the Square doesn’t change between iterations
Actual result: Square shifts a different amount every time

Reproducible with: 2023.1.0a19, 2023.1.20f1, 6000.0.50f1, 6000.1.6f1, 6000.2.0b4
Not reproducible with: 2022.1.0a2, 2022.3.63f1, 2023.1.0a18

Reproducible on: M1 Max MacOS 15.1.1
Not reproducible on: No other environment tested

Note: 2023.1.0a15 - 2023.1.0a18 produces a consistent result, but the value differs from earlier versions (‘1' instead of '0.3999…’)