Ahri charm and Alistar Q interaction

I recently played a game as Alistar with an Ahri on my team. There were at least two instances where Ahri would hit an enemy with a charm and I would follow up with an E + Q combo. When the enemy was knocked up by my Q they would remain suspended in the air instead of falling back to the ground. Eventually they would return to the ground, but the bug caused them to remain in the air for longer than they should have.