When my friend tries to join one of my worlds, it seems to get him stuck in the loading screen, but in my other worlds, it lets him join in as usual. we tried restarting both our games, uninstalling and reinstalling, and hard-restarting both our consoles, but nothing seems to work. I don't know how this happens, nor how to fix it, but information on how to fix it would be really appreciated.
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We're tracking this issue in MCPE-36190, so this ticket is being resolved and linked as a duplicate.
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