After some time trying to ignore the resize window lag I hit my limit, every time I have chrome, chromium or any electron enabled app running the window resizing becomes excruciatingly slow in Unity.
After some searching around and looking in Chrome/Chromiums bug databases it seems that whenever you run the browser with GPU acceleration enabled this issue occurs. If it's NVIDIAS fault or if it's the devs behind Chrome/Chromium I can't say... But I did manage to find a fix for it.
Do note that this doesn't apply if you're using the Nouveau driver.