I see, the solution I came upon could have been a placebo and the problem was something else, but it was the thing that seemed to work. I have three teleportals in a row very close to each other, one of them seemed to work wall mounted but the other two wouldnt until I moved them off the wall. Perhaps the detection got confused with so many portals and beacons in close proximity. Maybe I'll see if I can break em again and show you.
Edit: Oh by wall mounted I mean collision set to wall, if that makes a difference.