Repro steps:
  1. Join two clients to this world.
  2. On either client, click the left cube. All spheres will move to the same height; wait for all positions to sync.
  3. On either client, click the right cube. Ownership will be divided between each client, and heights will be set to reflect the current owner. Wait for these positions to sync on both clients.
  4. Join a third client to the instance. Some of the object positions will never sync for this third client.