So I am at the hags hut, killed the redcaps and started downstairs. Talked to the one that has the illusion spell placed on him, and when I got out of convo, Shadowheart (I believe) has a conversation marker. So I clicked on her and somehow, she was in conversation with the door. The issue is that all the dialog was absent and the cutscene was glitched in the ground or door. So I couldn't see anything. There was no audio dialog. Could not select any other character, nothing. Well I failed the last persuasion check and the screen went black. All I could hear was the guy with the illusion spell talking. Pressing ESC did nothing, heard the menu open, but no visual. Let it sit on the black screen for a few minutes, just to make sure.
Yeah literally just had the same bug. Running in Vulkan with GeForce 1070.