System- Xbox Series X. Wireless 5g connection. 

Failure to export saved file saved from realm back to realm. File size is 2.0 gb. New realm added and still unable to save. Export in progress shows progress bar at 100% and screen background freezes. After some time waiting error window pops up. 
I have tried connecting to different networks, uninstalling and reinstalling the game, restarting the wifi, powering off unplugging the system and powering the system back on and verious combinations of this.