I was playing as 
and when I saw a 
use her ultimate and I knocked her up but since the ultimate is a channel and hard cc can interrupt a channel and then I used my knock up, guess what, it did not knock the thus getting me killed. Please fix this game breaking bug.
Lux's ultimate Final Spark is not a channel. It goes off regardless of what happens to her (unless she dies mid-cast). CC will not cancel the casting of her ultimate. Ezreal's Trueshot Barrage is the same way.
Not a bug; that's not how the game works.
I don't think a rainboom can be stopped by evil beings. That lux would be like "Banish the shadows!
lux's ult is just a super long cast time, not a channel, so this is working as intended.
Lux's ultimate is not a channel.
It has a long cast animation.
Can't stop Lux ult once it starts(unless you kill her in like .5 seconds) since it's not a channel, it's just a long cast time. Same goes for Ez ult.
