Mystery muted users

Hello @UserID47081 

Thanks for posting about this. 

You can mute an athlete you follow to hide the athlete's activity from your feed. You will no longer see their activities, posts, challenges, or club joins. Strava will not let the athlete know that you have muted them. To unmute an athlete, tap Following from the athlete's profile page or next to their name in your list of followers and deselect the Mute option. Muting an athlete can only be done on the Strava app.

For full details on managing your Strava Followers, please visit this link.

Thanks again for posting and let us know if you have any further questions.