Notes:
1. I encountered this issue on Xbox Series X
2. I was playing WITH FRIENDS
3. I was playing as Catti Brie
4. Quit back to character selection and select the appropropriate Catti Brie instance. 2 instances were now displayed, Level 10 created by me, Level 1 created by the bug. The Level 10 character had all progress, gold and items associated with the mission completed immediately prior. After switching characters and rejoining the host, the issue was resolved.

Steps:
Completed a multiplayer mission. Returned to town.

Result:
On loading into town, I was a default level 1 Catti Brie character, not level 10 with gear.

Expected Result:
The character I played the mission with should be the one that loads. A new character at level 1 should not be created.