Game "crash" when talking to an NPC

Playing on PC via Steam. Currently just started the 2nd Act of the campaign and am in Hossberg Wetlands. Whenever I talk to Mila the screen flashes white and takes me back to the Title screen of the game. 

I've talked to other NPCs in the area and can play the game as per normal, but thought I'd report this weird issue. I've verified the game files on steam and no issue seems to be present with the files.