Maintenance has concluded and we have applied a small patch. Please see the patch notes below:
-Wardrobe Bonuses are now disabled in Arena.
-Costume Wing Effects should no longer disappear when mounted.
-SE14 Pets now have their special skills.
-Fire Skeleton Hat texture has been adjusted to match the Fire Skeleton Costume.
Maintenance has concluded + Patch Notes
Source: Steam Community (opens in a new tab)