I've done various keyword searches to see if anyone else is experiencing this, but didn't find anything. The closest I found was this guys post.
Basically a city will only render properly when you're looking at it. I can be flying along, have a city at my 3 o'clock. If I look at my 9 o'clock, then back at my 3, the city will have de-spawned and will re-render itself 1 second later. Even if I only look away for 5 seconds. I guess you could also call this pop in. It's extremely jarring and annoying.
I've got a high end rig (i7 7700k + 2080ti + 16gb ram) and I'm using ultra settings. I'm pegged at 100fps almost always, which is my monitor hz cap. I'm willing to sacrifice performance in order to have things STAY RENDERED around my aircraft. Is there some magical combination of settings I need to use? INI tweaks? Any advice would be great!
More Edits: Game is installed on my OS drive, which is an NVME SSD. It's also the Steam version, but that shouldn't matter any.
Video Example (just uploaded, YT might not have made it HD quality yet):