in an single player world command "/data get entity" has never worked in any version has can remember and always work in any other world not sure if this the right place and even mojang has any tactical support team than just report bugs. tested that command in two world and both world its creative and cheat enabled have tried optimize that world so its not working in am trying to use that command "/data get entity" on wandering_trader, that has non UUID the command will look like this "/data get entity dbec7311-53e7-4a88-8672-4aeba914af40" and have not crazy clue what its blocking it and is it a command that can disable and enable it? the world its old and always more or less used every singel jave edition version history to play on to explore now stuff.. i think this can be chunks, command blocks or the world its too old