is the jetways problem still active today?
As already explained in this ( and many other ) threads about the jetway problem, we could only fix some issues but, regardless of what we do, jetways will still randomly disappear.
The clear proof the scenery is perfectly fine, and it's a bug of the sim is that, if you move away from the airport (either in Slew mode or returning to the Main menu), then go back to the airport again, all jetways will show, proving the scenery is fine, and it's just a bug of the *initial* loading of the airport, likely a side effect of the loading speedup optimizations introduced with Sim Update 5.
The problem affects every scenery with jetways, from every developer and it happens also on some default airports. Itt has been confirmed as a bug by MS/Asobo, which should be fixed in Sim Update 6, to be released sometime during late October.