I’ve had this issue repeatedly in PVE & WvW. I understand the purpose behind the patch, but as op stated, I get it on flat ground where I should be able to use Infiltrator’s Arrow. This is a problem, I use this to escape quite often, especially when soloing champs.
The error basically removes one or more of my skills making some fights extremely more difficult. I’ve also still encountered pitfalls/holes in the terrain that are impossible to get out of, and teleporting is the only option short of the waypoint.