Mesh colliders are not updating their positions of bounds correctly

6.2.X

As Designed

We've investigated the issue and it seems the problem is in user's code. When the MainGame scene is played, we can see a couple of `Wreck(Clone)` objects instantiated. If we check the hierarchy, we can see that the parts with colliders (`Bridge2`, `Bridge3`, etc.) do not have matching geometry and collision. The colliders are a lot smaller and do not match the geometry at all. This is because of user's code lines 50 and 51 in `Mine.cs`. These lines change the parts' localScale *post* instantiation without triggering a rebake of the mesh colliders. The fact that the assigned local scale is random also explains the randomness of reproducibility of the bug - it depends on how large the mismatch between the post instantiation local scale and scale on instantiate are. The same can be reproduced by simply dropping the Wreck prefab into scene during Editmode and adjusting the scale of each of the parts - this also results in geometry no longer matching the baked collision until the MeshCollider is reenabled or the mesh is reassigned to trigger a rebake. It's a relatively expensive operation therefore it's not done automatically and requires extra steps from user to trigger it. Recommendation is to either trigger enable/disable of the component via scripting during the scale changes or unassign/assign the target mesh of the MeshCollider component.