Newest insider program beta on 5 Oct. Worked great for about 8 hours doing many saves/loads/imports but never switched programs. After a save and running several apps i tried to restart the beta and received this. Did several hard boots of the xbox with no success. Tried deleting all cloud saves and unsinstalled reinstalled with no success. Program is completely dead now.
On our closed realm (larger minecraft YouTuber) i have observed issues are worst for everone if even one client on the realm is on an underpowered Android or IPhone device or even an old pc. Users connecting over cellular as opposed to wired/wifi also seem to pull down performance.
Our realms save size is also very large (over 1 gb) and garbage collection issues over the day may also be an issue as it appears to get worst the longer it is from the nightly reboot..
Published recommended device specs (not minimum) might help big realms like ours if admins could configure the minimum clients they want to accept in their realms. We rarely see issues when most of us are on xbox one x or s and/or on modern gaming pcs. Published Realm services specs would also help large realms like ours such as publishing the specs of the virtual servers you use to host the realm including memory and best practices for managing realm size.