I created this image from map fragments, not sure I got the scaling right but can show the issue...
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The green teleporter leads to paineel, that is definitely the bugged one. I have 3 images on the bottom showing the lower level (porter area), mid level (near that invisible wall that leads down), and the upper level (with that lone elemental above).
I colored the Paineel porter Green for reference, the Neriak porter Pink. The Erudin porter appeared to be in a wall so didn't bother as you never walk above it.
I then attempted to superimpose everything above (kind of hard to see), but then illustrated on the individual maps where the colored areas correlate to.
I think Ataxio may be correct as it is only the Paineel porter that is bugged as the Neriak porter appears to be directly in the doorway that leads into the building that houses the lone elemental. Perhaps I have the scaling wrong and the 'zone line' for that porter is just barely in the wall to the left and right of that door. I'll try and wiggle around there and see if I porter out to Neriak, will let you know.
Hope this helps to illustrate the problem!