At least one of my characters on the eternal realm had all of their cosmetic items revert to the default look. I can no longer change any of the cosmetic items; I can select them, and I can apparently save them, but the changes do not persist—the character always reverts back to the defaults.
Confusingly, boots appear in both the boots slot in the wardrobe and the gloves slot.
I have two wardrobe slots unlocked for the character. Neither can be loaded nor overwritten. Pants appear on my head in both previews.
I created this character during Season of the Construct and had not loaded it since then.