I was playing an online multiplayer survival world on my Nintendo Switch, and there is a bug where when you go through a nether portal to the overworld, it stays on the loading screen forever. It is bad because all the people on the world have to leave because you have to leave and rejoin the game to fix it. Mojang, please fix this bug!
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Thank you for your report!
We're actually already tracking this issue under MCPE-44815.
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