I have the same problem did you ever resolve it?
On Play page, "Outgoing" popup won't go away or remove old challenges

go to all settings - live chess - challenge alerts - nobody. worked for me hope it does for you aswell.
go to all settings - live chess - challenge alerts - nobody. worked for me hope it does for you aswell.
I'm having the same issue. This didn't work for me but might just need to reset the browser or something. Also, since most of these comments are recent and the post is from 6 months ago, chess.com probably pushed something out that caused these popups to show more often. Hopefully it gets fixed soon.
On the Play page, each time I create a challenge or offer a rematch, I see this "Outgoing" popup to the lower right (FYI I'm using the web site version, Firefox). During the game and after, the "Outgoing" popup won't go away or remove old challenges, so after playing e.g. 10 games I see the Outgoing popup with 10 "challenges". There is a close button, but it's very distracting trying to get to it and play bullet at the same time. Anyone else seeing what I'm seeing, and is there a way to turn it off?