Nametagged Mobs despawning

The new goats from the update - me and my cousins where playing on our realm and each of us got them as pets (name tagged all of them and leashed them in a barrier box so they couldn't jump out) we all logged off to sleep and when I logged on all of them where gone - this has happened a bunch of times before where we've lost nametagged villagers - pandas - pigs - sheep and so on. I've lost multiple pets and I know it's not just sone realm prank because I was online on my own. Left my pet panda in a sealed enclosure I built came back 2 minutes later and she was gone - no one else online so it couldnt be silly realm pranks. And over 10 different nametagged villagers have gone missing too all of which went missing during peaceful mode so it couldn't have been a zombie - again all where nametagged and max level on trades all had a bed and work station that they could get to without problems or path blockers. Mojang  I love what you do Minecraft is basically the only game I play, I've been playing it since the very beginning Thankyou for all the constant work you do if this is something you can fix please do ♥️ Thankyou