[GAMEPLAY] Crazy Nunu & Willump Bug/Glitch with Rek'Sai (Huge knockup + Invisible Ultimate)

Basically, I get caught out by the enemy Rek'Sai as I'm play the new Nunu & Willump. Rek'Sai knocks me up with his Burrow and causes me too launch up to the sky. When I fell back down I seemed to have been invisible, as you can see I initially wasn't moving because I thought I was going to die immediately. After being confused for a second I realized it might be bugged and tried to auto and then I used my R, as you can see they never saw me and I was completely invisible since they let me complete it.

I asked them right after when we were all confused and in disbelief if they could see me at all after Rek'Sai launched me up, they said no.

Rito what is this xD