This functionality in Bedrock should change to be used in other worlds.
Having this issue on the Switch. Changing the resolution down does not help. I've tried multiple packs included in realms and they crash on the Switch. Seems to be ok on Android. It will log in and then maybe about 10 seconds it will totally crash the game and end up on the home screen.
The slider for the resolution change is kinda wonky anyway, upon re-opening the game from the crash, it usually reverts back to 128x even if you had changed it, exited settings, and returned to verify it stays at 64x. It's either not working properly or resets after the game crashes back to 128x.
"The software was closed because an error occurred."
Switch v1.16.201
Daughter's account won't sign in. Mine oddly does log in ok. It worked yesterday without any issues 😞
EDIT: Cleared login data from settings and went through the annoying process of associating it with her ms account. It logged in. Had to close out and login a few times before friends would show up. Then she couldn't connect to their worlds.
It's really aggravating how this works...or doesn't.
https://bugs.mojang.com/browse/MCPE-49465?focusedCommentId=775371&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-775371
Working as intended unfortunately. 1.16.220 is here and still does not save to file, it saves to the World's database file.