I have encountered similar issue when I played the game with creative mode on Windows 11.
Everytime I mouse over search editbox on inventory screen with my google Japanese input turned on, game freezes and not possible to close inventory screen or continue the game. This doesn't occur if I use Microsoft IME Japanese input.
This issue occurs only for bedrock and does not occur for Java edition.
This issue started after I updated the game to v1.20.1 (I'm not sure which version I was playing before update).
Because of this issue, it is nearly impossible to play the game with creative mode if I use google Japanese input.
This issue is still happening on 1.20.51.