This happens to me as well, but on a PS4.
Usually after I create a new character or exit the world, switch the character and come back, my characters also aren't showing. When this happens, I know that there is a bug and something is wrong. I reported it like three times (once by bumping my old thread) and nothing is done about it.
Restarting the game usually helps me, but doing this eventually stopped working on my account and I now use my mum's. (She doesn't use it anyway)
I also once had a black screen with the Guide's name on it and it was caused by the same bug.