Think I may have found the reason for the huge spikes in FPS...and you're not gonna like it

[BilingualHarp7]

Here is a reponse from Microsoft I come across in another thread. It also says to reduce LOD so they know this is a problem.

What in this update broke the fps?

So I heard back from support. Here is their response: Support (Microsoft Flight Simulator) Mar 10, 2021, 17:11 GMT+1 Hi xxx, Thanks for bringing this matter to our attention. This issue has been tracked in our internal bug tracker and we’re currently investigating. In the meantime we recommend doing the following: Launch Microsoft Flight Simulator Go to Options > General Select Graphics Under Advanced Settings and scale down “Render Scaling” to 80 instead of 100 or above. Kind regards, …