Hello! No need to file a ticket!
Mojang Status
 @MojangStatus
17 Nov 2020
Bedrock: The Minecraft 1.16.100 update has gone out early on Nintendo Switch, causing issues with cross-platform multiplayer. The update will release on all platforms Tuesday, Nov 17 at 9am Pacific (5pm GMT). -MG
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Is this effecting ALL cross-platform multiplayer? I can't connect to an Xbox realm from my Windows 10 and they can't connect to mine. Will that be fixed too?
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Replying to @frigzzler
We apologize for the inconvenience, but this is currently a known issue. The team is currently working on a fix that we hope to have out to everyone as soon as possible. Thank you for your patience while we work on the solution! ^CD

Nov 18, 2020 · 2:39 PM UTC