Custom skins do not appear in single player

Custom skins appear as expected in Realms and multiplayer servers, but do not appear in single player. Skin was uploaded via the launcher.

Thanks to the below Reddit post, I have discovered that renaming the image file to my Minecraft username fixes this bug. It’s a minor issue, but frankly I’m lucky I found this solution, and the file name being the fix is honestly absurd.

https://www.reddit.com/r/Minecraft/comments/15mv55h/why_is_minecraft_skin_not_showing_in_singleplayer/

Please fix so that custom skins work in single player regardless of file name.

I note this was not an issue in older versions of Minecraft, but I can’t recall the last version I checked this on.