Dissapearing Boats linked to Despawning Tamed Animals

So, I assume we all know about the boat bug (when exiting a boat, it disappears, I've watched a player become invisible while he could enter the boat but I couldn't even see it (split screen)).

HOWEVER. All of our tamed mobs have disappeared as well when this happens. Anything we have touched; horses, cats, dogs, axolotls, cows, sheeps pigs. GONE. Immediately. Yet all the other mobs that spawn naturally are still there. At the exact same time, all of our armor stands, paintings, and minecarts (on a rail), also dissapear.

I'm wondering if anyone else has this issue? It seems to be happening WITHOUT boats now too. It seems random. Help!