Arriving at EGCC from EDDM I was surprised by all jetways floating (see picture). Closing and Restart P3Dv4 gives the same outcome. I had it once before on a smaller English or Scottish airport (can't remember which one), so it's not a one-time issue.
I ran the Airport Elevation Correction in ORBX Global Vector's FTX Central (I always do after installing new scenery). EGCC is not disabled. EGCC's scenery is default.
My guess is that it has something to do with the surrounding terrain elevation.
Dirk