My friend and I have been playing beta together on one of my multiplayer worlds. We both updated to the newest beta 1.6.0.1 and now when he trys to load into my world it gives him a "disconnected from server" after the "generating world" screen. Both of us are on Wi-Fi, updated to newest version, and signed in to Xbox live.
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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