I got to the boss named Azhdaha, fought it for 20 seconds before getting launched high up into the air and wound up back at the top of the hole. Dropped back down to fight it again and it was gone. Not sure if that was supposed to happen or not I traveled to the left and there was a prompt to press triangle, so I did. A cutscene plays and some dialogue was spoken. I traveled back past the boss room to the right and the boss's life bar appeared. I went back to the boss room and fought the boss, defeated it, and after some dialogue I was presented with next story mission which has four objectives. One of the objectives was the room to left that had just interacted with. I went and completed a second objective and in the quest log it had a check mark next to it. The objective from the left room does not have a check mark and it cannot be interacted with again. I was hoping that completing a second one would check the first one but no luck. Cannot progress the story any further and my save is at 49.6% with 16 hours in.