Xoti got stuck when i sent the 3 person party to the bottom right of the initial area right after entering the engwithan dig site. Had to reload cause she was to for away to exit the map "YOU MUST GATHER YOUR PARTY BEFORE VENTURING FORTH!!!!"
Steps:
Start a new game
Save in the captains cabin immediately after waking up
Proceed to the island
Load the cabin save
Proceed to the island again
Youll see that your named character has been duplicated with separate saves
Windows 10/Steam
Yeah same bug here, in the Sea Cave w just me and Eder. When we both leveled, I chose to level him up first and after finishing, my character was duped as described above.