(GAMEPLAY) [URGENT] Karthus Q has 2 pretty big bugs

I've exited a game recently where I was playing karthus mid in a really intense matchup. Whilst playing the game, I came across a bug on Karthus that almost ended up throwing fights altogether because I couldn't get any initial damage out whilst casting my q.

Here's what happens: When Karthus goes in and casts his q, it should go off all the way and work like its suppose to. Except, if Karthus is killed before his q detonates, it not only despawns altogether, but no animation nor any form of damage output occurs. Easiest way to test it is to literally kill karthus right as he presses q. Literally this threw so many fights for us that I just couldn't keep count and went aoe with him, haha.

On another note to his q, although this one is more aethestic and makes it rather difficult to calculate his q's distance: his q, whilst in the death defied state, will glitch out for its range, where it shows an image of the q being farther than the actual q can go, then teleports the q backwards to where it should. This is pretty bad as it makes Karthus q really difficult to aim, as casting outside his q range does the bug itself whilst trying to spam the ability.

Ultimately, his q breaks when he is killed before it detonates, and his q also has an indicator bug that's really prevalent with how he should be play.