Thanks for reporting this issue. To be honest, I have no idea, why the buildings disappear. I do have a couple of exlusion areas in the final to rwy because the default buildings have been too tall. I have checked your screenshots
here, but the region which gets removed and rebuilt is not touched by my scenery. I have noticed similar behaviour in scenery designer, where particular manipulations cause the surrounding areas repeatedly to become flattened and rebuilt again (up to 10 times). Therefore I fear, that there is nothing I can improve for that not to happen.
Maybe you can check flying the approach one without the Kai Tak sceenry loaded in communkity folder?
The only other thing, which could make a difference is playing with the LOD settings in the sim.
