Grey Talon ult freezes and doesn't allow you to regain control of it after the game resumes from a pause. You're forced to hit spacebar to dismiss yourself from the bird.
players on my team were pausing against an enemy grey talon and someone explained that it caused them to lose control of the ult. It seemed to be working because the enemy team called us lame players and cheaters after the match.
Hey i was the bebop in that match! We were stacking and it was so frustrating that you guys paused almost every time to waste his ult Silly bug for sure