It affects all WideFOV HMDs that go beyond 115/120 degrees, Pimax, StarVR and XTAL.
The problem has already been recorded here, but nothing has been changed.
Support for Wide FOV VR headsets (removing Frustum Culling issue)- - Virtual Reality (VR) / VR Wishlist - Microsoft Flight Simulator Forums
I’m already panicking about the day when my copilot no longer disappears like Houdini or instruments, buildings and trees stay in the places where they belong.
One solution, but with massive performance losses, is, as already mentioned, parallel projection.
Or sell your $ 9000 XTAL and use wmr diving goggles.
" it’s up to everyone else, but not us."