[GAMEPLAY] Unable to path on Karthus' dead body

After Karthus dies, he goes into his passive. After the passive ends, his body disintegrates into a black spot where he died. This disintegrated stage is bugged. While your enemy Karthus is during this stage, right clicking on the remains will not move you! If you are fighting around where a Karthus has died, your kiting will suddenly go horribly wrong if you right click on his remains. Your pathing will not change—if you are moving in a direction and as you are moving click on Karthus' remains, you will continue with your current movement. If you are not moving and click on Karthus' remains, you will continue to not move. In short, right-clicking on his remains will be just as if you did not click on anything.

1. Begin a game against a Karthus—training mode vs a Karthus Bot is easiest. You may pick ANY champion.
2. Let the Karthus level up a few times so there is more downtime between his passive ending and him respawning since this is the window in which the bug exists.
3. Wait for Karthus' passive to end. You can click on him during his passive and you will move.
4. Once his passive ends, you will see that charred floor, the disintegrated remains, the blackened corpse, or whatever you want to call it. Right-click on the center of this. You will not move.

A potentially helpful piece of additional info: When Karthus is in his 'remains' state (i.e. after his passive and before he respawns), holding alt and left-clicking on his remains will result in the message "(your name) has targeted (their name)" (the exact same message as when you do this to any alive champion). During his passive (which is when you can move as intended/the bug is not yet present) this ping will not appear and instead it will be like any other corpse—until Karthus' passive ends, that is. Therefore: 5) BONUS: during his 'remains' state, hold alt and left-click on him. The targeting ping will target Karthus even though he is dead.

In case I wasn't clear, if you click past the remains, your champion is still able to walk over the remains like they aren't there. The bug is only when you try pathing onto the remains or pinging on the remains.

EDIT: I posted this same bug report "about a year ago". I don't explain it well there, but here is the link simply as proof that it has been around for at least 10 months, possibly more than 12 since I was practicing the new Kat which came out over a year ago. https://boards.na.leagueoflegends.com/en/c/bug-report/XcEH0tbJ-gameplay-unable-to-walk-on-karthus-corpse-bug