In the Hollow Swamps area, the fort blocked by the Shrieker, I snuck in a side way. I moved my party all in sneak mode until the Red Prince entered a sight cone. He won the first persuasion and convinced the magisteres that he was undercover. I pumped them for information, but failed the second persuasion to try to get them to withdraw.
The bug happened next - I was able to move the rest of the team, still in Sneak mode, directly through red sight cones, but the enemy didn't detect me at all. I also had to use force-attack to hit them, they were not considered hostile despite that the Red Prince was engaging in combat.
