What is your TLOD? I have this problem with a TLOD at 400, I reduced it to 200 and it's gone. When I first spawn in, they are not there, then if I switch quickly between FREE CAM and RESUME a number of times I get the glitches. Someone suggested that the graphics card might be on it's way out. I've just purchased a brand new 5080 and it's the same. Not sure if it's a problem with some airports and the way the developer had built it, or a MSFS issue.
Graphic / Texture glitches in 2024 - Microsoft Flight Simulator (2020/2024) - The AVSIM Community