If Griff is on Neutral and standing near you while you’re in the water when a fish attacks you, the Griff will fly away... and away... and away. Had to chase mine 4 map quadrants. It was almost like it was on wander. Has something to do with a glitch and not being able to attack water units. This happened 4 times to me in 2 weeks.
imo these are the BEST flying mounts in the game because you can hold 2 people and shoot of of its back along with their maneuverability, speed, damage output, stamina, dive bomb, 2 special attacks, and health. I'm currently leveling up my griffin and so far it has 500% damage, 1500 stamina, and 15k health and there is practically nothing that can take it down. (also, its dive bomb swipe attack does over 1000 damage!)