Twice now our group has tried to run Ascalonian Catacombs Explorable and run into bugs. The first, we did the Ghost Eater route and did fine until getting to the final event. We got to where the map indicator told us to, and then nothing happened. We ran out, ran back in, took out a few random mobs we had bypassed, completely left the dungeon, came back, and nothing.
The second run, we decided to avoid that route (just in case) and did the route that has you go to the Lovers’ room and kill the graveling burrows. When attacking the burrows in melee, many of the attacks would simply miss. While attacking with range attacks, many attacks were either obstructed or out of range, despite the fact that neither was true. Ground AoEs were about the only option, and that wasn’t really enough to keep up with things.