Here is a fresh example at another airport. I conducted a flight from KORD-KCVG this morning. P3D 4.5 (latest update), GSX full version (ran FSDT live update yesterday). PMDG 737ngxu (most recent update - default livery) both airports are utilizing updated AFCADs (downloaded from AVSIM, verified for P3d). GSX departure services went without a hitch. No issues. When close to KCVG, aprx. 9,000ft, I opened GSX and requested my gate at CVG (A15) as I normally do. Once I arrived at the gate, it was invisible. You could see the gate logo (in this case Delta), I believe the gate number where it normally is, maybe a few other things like the wheels below the jetway. Everything else was invisible. All other gates looked normal around me, however. I went into GSX customize airport position menu, selected my gate and all of a sudden it was no longer invisible. It looked normal.
Once parked at the gate, I requested debording. The gate moved and attached to the plane as it should, Catering/refueling/debording just showed "requested", however none of those things occurred. Almost as if GSX was paused. Airplane doors were all open (left front/rear entry, right front/rear, cargo front/rear) - also I have GSX set to ignore door positions when in auto mode.
Also- I should mention - I modified all A terminal jetways within GSX to the Crystal Aerotech 3 tunnel crystal 47/85 (previously - several days ago)