One of the many typing-related bugs in 1.20.30 is this, where once a player adds a colour code to their text, all their normal text before it will start deleting, and the caret also disappears. This only started happening with this update, and only affects iOS.
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Ah, I tried searching for duplicates before, however, it seems this website doesn’t support searching for symbols.
Thank you for your report!
We're tracking this issue in MCPE-174480, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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