me mate is having issues has anyone experienced this

so they went onto their own account homepage and seen that like a hundred or more of the manga they tagged to now reading is gone but then when they go to the yaoi tag the manga they were reading is there and untagged from the now reading thing and it's been happening a lot and they've re added the yaoi only to have it removed later on . has anyone else had this happen to them recently? I would really like to know