Idk if you tried this already, but create a lobby, select custom characters (remember that you need to rank up to unlock it), then try to find yours, it should be there automatically. And if not, could you say which character it was?
Ok there's no bug and I'm just dumb. I thought your custom character was supposed to automatically replace the default zardy sprite, I didn't even know there were other mod characters you could choose from the dropdown menu. My bad.
