Despite the 1.13.1, Realms on Bedrock version are still crashing and rollback to the last automatic save before 1.13.1 update. It Always erase all automatic save after 1.13.1 update.

Disconnection every 5 minutes, always unplayable (but still payable!)

It seems to work (don't know how many time) when you open a new Realm with a new world...

My world worked well on 1.12 and became unplayable since 1.13