UEFN sessions not connecting and Server Stopped Responding during private code sessions

Summary

These issues may be connected which is why I’ve combined them in one post. These issues started in 42.20 or gotten far worse.

When launching UEFN sessions, the UEFN software continually says Pushing Changes. Meanwhile, Fortnite has finished pushing and says “Push Changes to Refresh” in the top left. UEFN and our Live Edit seem to lose connection and the only way to refresh is exit session and relaunch every time OR use private codes.

Private codes however have a 50% success rate on launching. We will wait for minutes, get the loading screen into Fortnite, and then we get kicked to lobby with the error message “Server stopped responding to connection”.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

Unsure on reproduction in a new map, but in our map BuildAnArcade, it happens consistently with every session launch.

Expected Result

Sessions launch properly and have connection between softwares. Private codes launch properly and quickly.

Observed Result

Session does not launch properly

Platform(s)

PC

Island Code

0887-3599-7445 - private code

Video

Additional Notes

This is only happening in one of our projects, BuildAnArcade. This is a very large scale project, lots of verse, lots of scene graph, perhaps this could be part of the problem.

FORT-1161172 has been created and its status is ‘Unconfirmed’. This is now in a queue to be reproduced and confirmed.