After playing a few hours, FPS drops from 40 to 5FPS

[Tweak112]

I have no idea where I should post this issue. I have it since SU9 and already posted it in those threads but I really want Asobo to fix this, so I will post it here as well, as I have seen some similar issues in this thread.
My FPS do not degrade after a few hours, but they degrade upon landing at my destination. Doesn’t matter if it was 6 hours or 30 minutes.

Low fps on ground since sim update 9

Do you have the same issue if you follow the OP’s steps to reproduce it? Yes Provide extra information to complete the original description of the issue: Upon starting my sim I have more or less acceptable 37FPS at my departure airport on the ground. (I had around 45 before SU9) However when I approach my destination the FPS gets worse the closer I get to the airport. In the end I am at roughly 20FPS. If relevant, provide additional screenshots/video: Before [Screenshot (734)] After…

Poor performance on the ground

Do you have the same issue if you follow the OP’s steps to reproduce it? Yes Provide extra information to complete the original description of the issue: Upon starting my sim I have more or less acceptable 37FPS at my departure airport on the ground. (I had around 45 before SU9) However when I approach my destination the FPS starts degrading more and more the closer I get to the airport. In the end I am stuck at roughly 20FPS. If relevant, provide additional screenshots/video: Before …

Example
Arrived at my destination after roughly 1 hour flight time - 28FPS and stutters

Reloading at the same location with the exact same settings - 40FPS and smooth experience