hi Saxoni
Due to lag they may end up in the next sim, but as they are programmed to not cross sim borders under normal circumstances, they do not "realize" they entered a different sim, and just take it they are still at the same sim and go to their home coordinates there...
For a cat that would be sleeping somewhere wrongly i would need to see that in world.
If you still experience such a problem after the 1.14 update, please fill a ticket.
Regards
KittyCatS