Guild Wars 2

hi, as i was playing the game around the last chapter where u need to chose the 2 characters that go with u into the mind of the dragon i saw a glitch. I beat the first two bosses, but the last boss , modermoth is bugged, or more to the point the rift!!!! The rift that u need to open is bugged! It will open in a wide area away from Braham and i cannot fly or jump to it. i saw it happen once when he did a whirl . Then when one of my NPC people came it it was bugged out and i died.. Having to restart whole mission from the start of the fight is wrong>< also it happened when my second npc showed up and i had to use the rift on her. And it happened on my third npc that showed up and i could not do it for her. In totally i died ten times. i had to learn and restart so much that i don’t know what to do. Please fix this rift bug at the end or i cant beat the game. No one can . Please hurry and fix this. It seems to happen at any time u need to use the rift for an npc. So it happened once during each of my ten tries. ANET PLEASE FIX !! if u need a pic of the rift let me know Anet. Thank you