When you use the /locate command on a world that doesn't have the structure you are trying to find, the command will not return anything and any other command you do after that will not be executed (probably because it is trying to find the specified structure) and exiting the world will freeze MInecraft.
How to recreate: make a flat world with no structures and do /locate Village
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lord.quadrato
Thank you for your report!
We're tracking this issue in MC-126244, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Fixed. The fix will arrive in the next version and is already included in the latest development version of the game, you can check the Fix Version/s field in that ticket to learn more.
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