Bacchus knockup immunity bug?

So I played a few games again yesterday (and on Sunday), and came across something that seemed really stupid while playing a game of clash.

I was playing Bacchus and was stunlocking the enemy Poseidon (belch -> flopp) to set up for an easy kill for KKK with his ult.
My KKK ulted on my stun and I flopped the pos to keep him from using aegis. And I end up knocking pos up as the KKK ult hits him without him taking any damage.
I used my ult as well, just to 100% secure the kill. My ult and KKK ult hit pretty much at the same time. But it was only my damage that registered so pos got out with like 10hp xD

Anyone else had this problem?
Super annoying when you make a perfect play and you get ****ed by the game..

It seems to happen whenever you use an ability that has knock-up / push / pull on a god who's already knocked up. For example, Hercules's Driving Strike will also miss and do nothing if the enemy just got knocked up. Whether this is actually intended or a bug, I don't know though; they might've done this to prevent double knock-ups or some weird glitches with the pushing and pulling in mid-air.

would report this to hr anyway. normally how this should work is that the damage goes through.

CCstacking wise it should prolong the knock up or still knock the person back

Eartbreaker is not knockup though. That's a "throw", so you are supposed to be immune on that one (I think, you have always been immune in it at least).
Knockup should not make you immune, that is why knockup so good. Tyr for example knock up with fearless into cleave.

I guess I will have to send it in, maybe if the flop and KKK ult hit at the exact same time it screws with the game.