What plugins are you using? Plugins have the ability to listen to script changes, so perhaps a plugin you have is doing something performance-extensive when you write code?
Have you tried looking at the Microprofiler?
Have you tried different Render modes? ( File > Settings... Rendering > GraphicsMode )
The first i heard about this issue was 5 months ago and i think the same question was posted on here by a user with windows 10. I recommend just keeping your script editor in a separate window since its the only solution until roblox can find a fix.
Thanks, I would’ve never thought that would be the issue. Will ROBLOX ever find a way around this because it will get annoying having to change this all the time.
However I can just make it so G-Sync doesn’t apply to non-fullscreen programs, and playing games windowed reduces frame rate anyways, so it isn’t much of a problem.