My friend joins and then it says disconnectionscreen.unexpectedpacket

Cleaning up old tickets: This ticket has not been updated recently (1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.

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I feel that this issue is valid because me and a few friends have gotten this error before.

I downloaded a realm and updated and tried to play it. I just got that weird error. I can provide logs, etc.