The issue has been fixed, mostly. There is still no progress bar and the "failed" can still come up, but if you wait long enough it will work

I have been using the Minecraft bedrock realms for a while now and have found a feature before working, now broken.

The "Replace World" option while in the "Edit" options area for a realm would normally let you choose a singleplayer world from your worlds list to replace the current realm world. After selecting the world I want to be the replacement world in "screenshot 1" you can see that the "Export in Progress" window shows that 0.00MB out of 0.00MB have been exported even though the progress bar is around 25% done. The export finishes quickly even though the world I am using as the replacement is quite large. Shortly after the exporting is done you can see in "screenshot 2" the "Initializing Upload" phase starts, shortly followed by what happens in "screenshot 3". There is just the "Cancel" button and "Failed" above.

I have tried many things to fix this thinking it was on my behalf, but I now feel that this is a bug introduced in the 1.11 update for Minecraft (bedrock) as this only just started happening after I updated.

The 1.11.1 hotfix did not fix the issue.

Hope this can be resolved