Well, we did most of the optimization in the latest version but when we first released it, there were no performance issues. After the latest updates from Asobo, the scenery became unstable.(I know other airports expect LFPG and KJFK are working without issues) So we have also decided to wait till sim comes into a stable and optimized state. After then we can detect the problem in our spesific project.
Thanks for your feedback tho 