[CRITICAL] Progress loss following the list of a new version

Summary

[CRITICAL] Players who played a new version of the map get matchmaked into lobbies with the old version of the map, causing progress loss.
The old version of the map might not know how to read the persistance data saved by the new version, causing progress loss. This includes progress purchased by IAP. Players got connected into an old server 4 HOURS after the new version was listed!

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Matchmaking

Steps to Reproduce

  1. Publish a new version of a map, for example add a new variant of a character
  2. Play on the new version of the map and acquire a character with the new variant
  3. Leave the match, and matchmake into a public lobby

Expected Result

You should always be getting into a lobby with the new version, never into a lobby with a map version earlier than the last played map version.

Observed Result

You might get into a lobby with the old map version, causing the loss of the new variant - the old version will not be able to read the data of the new variant. This will cause the player to lose progress - progress that he might have got using IAP.

Platform(s)

All

Island Code

7875-7934-3852

Video

Additional Notes

This bug is really critical - players who spent V-Bucks could lose progress they paid for.

FORT-1078816 has been created and its status is ‘Unconfirmed’. This is now in a queue to be reproduced and confirmed.