There appears to be an incompatibility with Realms servers and JSON based custom worlds introduced in 1.16.
Now this incompatibility could very easily be tied simply to JSON based worlds with more than the standard three dimensions. I am currently working on an adventure style world for my friends to play on using Realms. For our purposes I have created a JSON based custom world with five additional dimensions beyond the original three.
The JSON based world works like a dream in single player, and on LAN. Sadly not all the players for this adventure can connect via LAN.
Attached below is the JSON used for the custom world, as well as a few images about the process.
The world itself uploads with no issues, but when attempting to connect the the world the loading screen never ends. It is not possible to proceed beyond that point. I understand that the JSON based custom worlds are experimental, but I also feel like this incompatibility is something that should be brought to your attention.
Thank you!
-Varlanou
Thank you for your report!
Minecraft Realms for Java Edition has received a lot of updates and fixes over the last two years, so this issue has probably already been fixed in the meantime (e.g. because it was a temporary outage or an issue with the base game).
Since this bug report has not been updated since at least two years, please let us know if this is still an issue in current versions of Minecraft and update the bug report if applicable. If this is no longer an issue, please let us know as well. Thanks!
This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
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