challenges
These are daily games? Have you submitted a bug report?
https://www.chess.com/forum/view/help-support/strange-bug-with-daily-games
https://www.chess.com/forum/view/help-support/how-to-stop-getting-daily-chess-recommended-matches
I assume you have set the range of players you are willing to accept.
https://support.chess.com/article/1962-how-do-i-choose-what-rating-my-opponents-are