On PS4, I've run Fang Lair several times since the patch and Markath. I've noticed that if you have a lot of burn, the DC will not happen on Caluurion, especially if you have enough to skip the totems. The DC occurs most of the time when the second totem appears.
However, I have noticed another glitch in Fang Lair this weekend. The gold guy who forms the wall on the ghosts phase was not appearing for me. He appeared for the group, but not me. Good times.
Okay, so they are aware of the problem. Here's the problem with that ... all the issues that have been plaguing PvP for some time has leaked over into the PvE world. The problems have not been solved, but have multiplied. ZOS, I do appreciate that you are aware of these problems, but this is during an UNDAUNTED event. I think it would be wise to compensate those participating in this event in some way since the event is apparently ruining everyone's time in the dungeons with completely frustration of your customers.