Critter gets hit by non damaging AoE, critter flees, pet goes after critter when mob is dead because it's still in combat with the critter.
Exactly. Demoralizing Roar is hitting the critter, putting the bear in combat with it. Then when the mobs are dead the bear goes chasing after the errant critter. Same thing happens with other pets that have non-damaging AoEs (foxes are especially guilty of this.)
75 Rabbit/75 Sheep/75 Coeurl/75 Eft/75 Raptor/75 Hippogryph/75 Puk
75 Scorpion/75 Wamoura/75 Pixie/75 Peiste/64 Sabotender
51 Bird/41 Mandragora/40 Bee/37 Crawler/37 Bat
Items no one cares about: O
Missions no one cares about: O
Crafts no one cares about: O