On PC, I got in a state where I attempted to talk to an NPC, but their dialog option was completely blank, and I had to go back to a previous save and lost progress because I couldn't get my character to exit the dialog screen.
Repro steps (roughly): 1) Be in Cyseal doing the murder investigation of the councilor 2) Have your main character talk to Captain Aurelus but don't finish dialog 3) Have a secondary character grab the Key or Journal, which should trigger guards to come 4) Have your main character quit the dialog option 5) Have every character flee 6) Go back to Captain Aurelus office, and two guard NPC's which were previously in the fight should still be in his office 7) With your main character, attempt to talk to one of the guard NPC's
Expected: Dialog options from guard and method to quit, or be unable to speak to the NPC's at all Actual: Able to interact with the guards, but the dialog page is completely blank with no way to back your character out of the dialog menu
If it matters, I had a party of 3. Two main characters and then the character in the cage outside the Captain's office (Bairatodr or something like that).