As per title - this is happened to me multiple times. Between the area with Riven where you open up one of the 3 portals to go through, then into the next area which is basically a traversal area before going through another Portal, which will then place you in the jumping section with spike traps and pots to break etc. For some reason, the Traversal Portal will not open sometimes, meaning we were soft-locked from processing. This was incredibly frustrating last night as we were on the last leg of the encounter, going into the Master difficulty area with a potential platinum score. Basically 30-40mins wasted, as all we could do was go to Orbit. I know sometimes the Portal won't open if someone is joining the fireteam, but in this case, all 3 of us where there. And as mentioned, this isn't the first time it's happened. I've looked at the bug reports and on the forums and can't seem to find any mention of this, but it also can't be that rare. I'm assuming this has happened to other people? Basically, until this bug can be acknowledged and fixed, I'm not going to be be running any more Coil (and basically not playing the game due to all the other bugs currently in the game). I'm not going to spend 30+ mins running an activity only to be unable to proceed through no fault of my own.