Upon bringing up the chat (on both Xbox and Windows 10), the customise chat menu shows up automatically and clumps together. Im unable to exit the menu, type in chat, or actually customize anything at all so the only solution is to get hurt (quite hard in creative) or to restart the game. This also means that spawning things in such as command blocks isnt possible. The chat works normally in servers, and I've only encountered this issue in personal worlds. Ive encountered this issue for around 3 months but I assumed it was a general issue for everyone until now when Ive discovered there seems to be no presence of it online. Both my friend and I encounter it, on our own and when we play together.