We already had a closer look. It seems that entities are not added to the world correctly, if they are created before the PhysicsWorld component is defined. So they are not “part” of the world and do not follow gravity or any calculations based on the colliders.
We are working on solving this issue. For now, please make sure that all your entities are placed after the PhysicsWorld in terms of the QML tree.
This leads to the world being created before the entities. Everything should work correctly then.