128x128 skins no longer working!

I commonly use 128x128 minecraft skins since I love the detail I can get on them, but I have an exact copy of my skin just with blue instead of pink, and I felt like switching over to the blue version and I attempted to only to find out my skin was “Not a skin silly!” despite it being perfectly fine as a skin during the previous version of the game.

Please fix this as I am most likely not the first to experience the bug.