I uploaded some footage to show off the FG stutter issue in better detail. The FPS counter and frametime graph will highlight the issue at hand as the FPS will drop significantly and the frametimes will exhibit noticeable spikes. The normal range that RTSS reports for this particular scene is about 340-350+ FPS with about 0.2-1.0ms for the frametime. When switching to the third-person camera view for certain vehicles and quickly moving the mouse back and forth, the FPS will drop to around 240-270 FPS and the frametimes will spike to around 3-6ms.
Prior to Update 1.1.2.0, all vehicles in third-person (and even the first-person infantry view) would exhibit this issue. After the update, as shown in the videos below, it seems like the devs addressed the issue but only for infantry, the ATV, and the light transport vehicle. These are the only 3 scenarios where the FPS does not drop and no stutters are present. I'm not sure what exactly the devs did to fix this, but I wish they did the same for the rest of the vehicles.
Another thing to point out that further adds to the theory that there is something wrong with how the third-person view is rendered, is that in the addition to the stutter issue, the affected vehicles do not properly engage motion blur when in third-person. Once again, switching to first-person renders it just fine.
On a side note, it seems like they fixed the issue with DLSS Super Resolution disabling itself in aircrafts and will no longer result in a pixelated image mid-flight. However, I did notice the issue is still present in the intro sequence for the campaign mission "No Sleep" when you're riding on the Little Bird over the river.