[GAMEPLAY] Rek'Sai can't knock up Warwick after Warwick ults her while she is burrowed.

It occurred in a normal game twice, I even tested it with a friend in a custom game. So when Warwick uses his ultimate on Rek'Sai while she is burrowed and Rek'Sai clicks Warwick while ulti and after ulti, the burrow knock up doesn't work, you can't even attack Warwick. Rek'Sai seems kind of frozen. It might have an inpact on the outcome of a game.