Tamed Wolves / Cats Becoming Un-tamed

My tamed wolf (dog) became un-tamed and was in the sitting position but was moving

What I expected to happen was...:
to log in and find my dog ready to fight.

What actually happened was...:
There was a wolf in the place of my dog and it was sitting.

Steps to Reproduce:
1. Play on a version.
2. quit game
3. log into a different version