I'm on AN Apple Touch and having the same issue. I've noticed that everything is fine until they walk away from the mirror or out of the dressing rooms. So blocking or not having enough isn't the issue. I've had the same setup for many months and I've got plenty of mirrors and dressing rooms and nothing is blocked. I have never seen the bubble that indicates they are looking for a mirror or dressing room. They don't have any problem finding a mirror or dressing room, they are just walking away from the mirrors and dressing rooms unhappy, as if the item didn't fit or or they didn't like how it looked. As with everyone else my happiness score has remained 100 but I'm not selling as much.
https://img.photobucket.com/albums/v4...shionstory.jpg
https://img.photobucket.com/albums/v4...hionstory1.jpg
I'm level 91 so not a novice on how to keep things unblocked. I thought maybe the new gold dressing room that I got from the goals might be the issue, so I removed it but didn't make any difference. I've done all the typical attempts to "fix" issues, rebooted, removed, reinstalled. I only have one version of the game yada yada yada.
Third gen Touch version 5.0.1