Hi @Occuros ,
I think I’ve found the source of the problem you’re hitting - it’s a bug that we already fixed, but it’ll be available with the next release (ETA later this month). The system in Unity.Physics\ECS\Base\Systems\BuildPhysicsWorld.cs needs to have a AlwaysUpdateSystem attribute.
If you’d like to give it a try before the new release, you can make Unity.Physics a local package (see this thread for guidelines) and just add the attribute.
Hoping this helps!