When renaming any item in a anvil to Unicode characters, the game will replace the Unicode characters with (, *, and ?. (possibly replacement characters?). Renaming a item in a anvil that already has been renamed with Unicode characters will not work. The anvil shouldn't allow items to be renamed to Unicode characters, (at least in survival).
Picture 1: Bugged renamed chest.
Picture 2: Attempting to rename chest (character translation before and after)
Duplicate of MC-178, please use the search function to see if your bug has already been submitted. Currently over 54% of tickets are being closed as duplicate.