I've had this happen to me twice, once on Veil and once on Tram. As the Alien Khammader, I was unable to cyst into System Waypointing from Sub Sector, and I was unable to cyst from Elevator Transfer into Observation.
I jumped out of the hive, and I even had someone jump in both times and had them try to cyst into the area and they both also failed. We were able to cyst around the map everywhere else, just not in that direction. Unfortunately in both cases, I didn't try cysting into the area from the other direction... (ie instead of E.T. to Obs, go from South Tunnels into Obs.)
Now that I remember it, I'm confident we were playing on the NSL version of those maps. Also it was running NSStats.
I jumped out of the hive, and I even had someone jump in both times and had them try to cyst into the area and they both also failed. We were able to cyst around the map everywhere else, just not in that direction. Unfortunately in both cases, I didn't try cysting into the area from the other direction... (ie instead of E.T. to Obs, go from South Tunnels into Obs.)
Now that I remember it, I'm confident we were playing on the NSL version of those maps. Also it was running NSStats.