[GAMEPLAY] Karthus Passive Bug

This bug was present ever since the Karthus rework, where he started to place a puddle on the location of his death after the passive.

The bug is like this - after Karthus dies, you just cannot right click on the area where he died. AND IT IS SUPER ANNOYING, when it is done in the narrow places, like entrance to the baron/dragon pit, or somewhere in the jungle. League's pathfinding is already not perfect, so why add this bitterness to our lives with this?

Rito, pls (tm) fix this. It's really annoying.

Chance of Occurence - 100% Way to reproduce - just kill Karthus, and it will come up in 100% of cases.