That sad, but I never find out the way to bring him back after he left. If you don't mind, I can give you my save file that Korg still stay at MC hut with some story processes, both B!Logan and Normal Logan.
Yea, that part of the story still needs to be written. In the following days I'll try to see what happens if you don't invite Korg at home but I'm pretty sure You need to wait for future updates
