KORD still used the default jetway animation system, which is very well known to be bugged, that's one of the main reason why SODE and GSX L2 exists.
Since we are working on a completely new KORD remake, we are not planning to update the current version but, you can of course replace jetways at FSDT KORD using GSX L2 customizations features, as with any other 3rd party scenery, and since it's an FSDT scenery, the full features of GSX L2 will be available for free.