Guild Wars 2

So, running the swamp fractal, every single possible path kept walling up the instant someone approached it, literally blocking off all possible passage. Note, this was a good dozen attempts, without a single wisp being delivered. What gives?

You can use the tree ramps next to the walls to jump around the walls. It is not an exploit, but intended, so that experienced players can use it to their advantage once they understand the fractal more. There’s a dev post about that, but I don’t feel like looking for it at the moment. The walls are just minor setbacks, not permanent problems.