I've heard this isn't unknown, but I thought I'd report that I've been getting 504 errors when using the wardrobe. These errors have been happening more frequently today in particular, and happen when I'm trying to change items, generally (I think) when I change an second item when the first change hasn't loaded an image yet.
I don't know if anything can be done, but I thought I'd report it anyway.

Edit: I now got a gateway timeout when changing no items, only colors.