Mord & Sett Ult Combo Perma-Suppression [BUG]

So I played a game with my friend playing sett jg and I was Mordakaiser top. Everything was normal until mid-game when we began to team fight. The timing was very lucky but I casted my Death Realm ultimate on the enemy Nasus right when Sett used his ult. Sett's ultimate suppresses the target while he is in the air with them. However since i sent him to the death real, the enemy Nasus was suppressed permanently throughout the whole 7 seconds of Mord's Ult. During that fight thought nothing off it but he stood still the whole time and I asked him if he was bugged and he responded saying he was supressed the whole time. Hopefully this is an issue that can be fixed!

~ ZacklemoreMC

Edit: I will try and pull this off again and test how often it happens