P3D V5 has a fairly different rendering of colors, with higher contrast and variations between different times of the day. You don't indicate a precise jetway model, so I took some screeenshots at FSDT Geneva, which has glass jetways, and as you can see, depending on the time of the day, they might give you the impression to be almost black, but they aren't.
We'll have to release a complete update of all jetways in the next weeks ( in order to make them compatible with AI ), so we might have a look to the textures as well, trying to find a compromise that would look equally good in P3D 4 and 5. They will never look exactly the same, though.
Also, note that with Enhanced Atmospheric, Dynamic reflections doesn't reflect the actual weather, this is a bug in P3D V5 which we know LM is working on.
