Pets of any kind do not respond after uploading world to realm

I was playing locally on my computer when I decided to take advantage of the free 30 day trial for a realm. I created my realm and after it spawned me, I soon after replaced the world with the aforementioned one. Ever since then, none of my pets will stand, eat food, or generally respond to commands. I've done much research into the plausible cause of this to no avail. I've seen similar issues where pets stop responding after an update, but all of their queries seem to be left unresolved. When I go back to playing locally on a copy of the world I had made before, the pets respond just fine. It was only after I uploaded it to the realm that they stopped responding. Is this a matter of ownership? Do they not recognize me as the same user that originally tamed them? Any direction would be helpful.