I agree with your comment, the jetways are a bit annoying when they move from straight to bent and back to straight depending on the viewing distance.
Whenever you see something "strange" in any of our sceneries, the first question to ask yourself, before suspecting a possible bug, is: "could be they made it on purpose, to improve performances ?", and you'll find out that, thinking about it, the answer is Yes 99% of the cases.
Bones animations used by jetways are expensive, and GSX uses bones animations too, fairly extensively. That's why many AI traffic packages suggest to turn off jetways for AI airplanes, because they can kill the frame rate if the bone is still visible in the distance (like when an AI use it), so we turn off the bones entirely at lower LOD settings, so jetways return to be static when seen from a distance.
Yes, it might be a bit annoying, but bad fps would be annoying way more...
