My problem is basically the one described in this topic: https://questions.x-plane.com/2584/flight-loading-airport-scenery-runways-taxiways-appear-landing
and it seems it is pretty common.
After a typical 1-2 hour IFR flight, parts of destination airport are not loaded (runway/taxiway network). I noted this also happens even with default airports (runway appears as grass runway). My specs: i7-8700K (o/c to 4.8), 32 Gb RAM, GTX 1080TI, M2 SSD 1 TB. I obviously have pretty high display settings, custom add-on aircraft and scenery (including simHeaven_X Europe). I don't use ortho tiles. My settings are optimised to produce at least 25 fps in the heaviest conditions.
After using 'reload scenery', scenery loads up correctly, but entire process takes about 5 minutes, so it's not an option as I fly on online network and cannot pause for such a long time.
I do have 'threaded optimisation' set to OFF in Nvidia Control Panel.
Could anyone suggest a working solution?
My X-Plane 11 is the latest stable version as of today (non-beta).