[GAMEPLAY] Warwick Q interaction with Janna's(or anyone's) knock-up makes him invisible

This clip from the replay shows what triggered the glitch. Not the glitch itself as it only affected me. I'm not 100% sure what's going on, but as I used Warwick's primary Q on Blitz while he was simultaneously knocked up I became invisible. I was only invisible in my game, and friends who were in the game confirmed this. I regained visibility of myself around 10 seconds later(possibly triggered by blood hunt). I was able to move around and use abilities while invisible. Possible steps for recreation:

1. Warwick uses Q(primary cast/not attach)
2. Have Warwick's target get knocked up(by Janna?) before he reaches/while he strikes the target.

This was my first time playing WW in a full game so I'm not sure of the success rate; however, I definitely think it's worth mentioning.