Tagged Mob Disappear

So I have 3 Goat attached to fence with lead, but one of the goat is disappear even the lead is not there. for the first time I think I accidentaly hit them, but I have backup map and when I rollback to the previous backup, the next day my goat is still disappear.

I have an Armadillo pen, after the Goat is disappear I moved them next to Armadillo pen, 2 of Armadillo disappear, i still think if it’s the goat hit the Armadillo, so I moved the Goat to Sniffer pen, but they all (four of Armadillo) still disappear too,

I have 2 Sniffer with their own pen, and they disappear too, while the Horse, Goat, and Panda is still there, just the Sniffer Disappear.

So after the latest update, my animals keep disappearing, even mob in my friend basement and mob in their own pen with fences around