Guild Wars 2

Hi how goes it.
I have this problem in the Honor of the Waves Path 3, whereby after defeating Fimbul the door that leads into the next section of the dungeon doesnt open(the one with the two icebombs next to it).
Is this a common glitch or am I and the group doing something wrong?
Mainly because ive only ran path 3, three times and on all occasions its happened and as a result ive really hesitant do run it again, id really like to get my tokens and that achievement.
Any help or feedback is appreciated thanks guys.

I saw that “glitch” once, the door opens when you kill all the mobs after the boss. Some of those mobs had disappeared on us but we found them on the upper levels somehow. It looked as if they teleported to someone that was running back from the warp right at the end of the boss which is how we found them in the first place.

I see so this relates to the way point glitch, in the future ill make sure to have the creeps killed as soon as possible. Ill give it a go next time i run the dungeon.
Thanks for that.