Hey ho!
If a pet is disabled to follow their master if he is in draft mode and the pet have a area restriction, it ignores the area restiction and wander arround outside of it.
bump
This seemed to have been a thing for awhile if you triggered the pet to not follow after you drafted the pawn. It would fix itself once you undrafted the pawn. I just thought it was done that way by design. (--unless bonded animal has been changed I haven't looked into the animals with this new unstable update.)
Fixed, thanks.