I have been having the same issue for the last week. I have looked at similar issue reports, that have status of "Closed - Unable to replicate", but have the same issue on 3 devices!
I have paid for devices and software for 3 devices so we can have a family LAN game on a long-haul flight at the end of the week, but no luck. It is looking like I will need to get the kids interested in some other games...
Additional Information:
IOS & Minecraft are up to date.
Child's IPAD does have content restrictions enabled, but I get same result with it disabled.
I have purchased the "Frozen" Pack.