How to reproduce:
1. Open the “DeepColliders“ project
2. Open the “SampleScene“
3. Enter the Play Mode
4. Observe the Game view

Expected result: All of the “falling” cubes touch the bottom cubes when they land
Actual result: Only two of the “falling” cubes touch the bottom cubes when they land

Reproducible with: 2023.3.0a5, 6000.0.4f1
Not reproducible with: 2021.3.39f1, 2022.3.31f1, 2023.3.0a4 

Reproducible on: macOS 13.5.2 (Intel), Windows 11 (User’s)
Not reproducible on: No other environments tested

Workaround: Select “ColliderAndMesh” GameObjects and quickly disable and enable the Box collider component in the Play Mode

Note: The leaf GameObjects in the Articulation Body tree are working as expected