The comet is a blue square in the minimap during replay mode
To reproduce:
Include how frequently you can get the issue to occur and any video or screenshots of the bug that might help clarify it.
May I ask if you're referring to the blue circle indicator? Pretty sure that's to tell spectators where it'll hit. Maybe it'd be better not to see it in spectator mode though.
Edit: saw the minimap square. I think you have a missing file. I'll go check one of my games for the issue.
Edit#2: It's a blue square in my games as well. Hopefully it's fixed next patch, but if you log into League and click on the bug in the very bottom right of the client you can submit a report through the in-client bug report tool (if you want).
Either way, thank you for reporting it^^
