Creature interactions :(

[Gendou]

There's a known glitch where, after abandoning a fight, mobs won't recognize a critter as their pet-battle version.
They will nom them as if they were the critter version. It's annoying, but it's been around since 5.2 hit.

[Tahsfenz]

I bet this "bug" is in there for blizz to screw with people who don't do the pet battles the way they intended.