The cursor of my screen lags when I go to the FDM window I don't know if it's compatible or my pc does not like FDM

Probable causes:
1)compiler optimizations
2)Some kind of thing that crashes and goes into a loop of crashes and slows down the performance of FDM
3)Some combination of those

Possible fixes:
1)add more compiler optimizations
2)fix any sort of bugs that loop crash
3)I Don't know how to fix it anymore

I hope this helps you understand the issue that FDM is having and I hope you see it and do any sort of changes that the cursor moves as it should