I was clicking on another persons shop (ssaalleess) during this search here: https://subeta.net/user_shops.php/search/shops/1+point+w and it takes me to the list of my own shops, instead of their shop, and shows my avatar blank on the sidebar. Using Firefox.

I'm pretty sure that happens because the shop you're going to go to is a legacy shop (created before the shop system was redone). Legacy shops exist in a different system and therefore they can't be accessed same way the new ones.

OK, thank you