find or summon some mob.
create some team (“foo” for example)
type '/team join foo “ and then pause.
In most commands (e.g., “/data get entity “ you will be offered auto-complete values, including the UUID of the targeted entity. This does not happen with “/team join foo “. You are only offered standard entity selectors, such as @a or @n.
Thank you for your report!
We're actually already tracking this issue in MC-269731, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote or any additional information to the main ticket it would be appreciated.
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