Is it a Gsync or Freesync enabled system? Some games - and possibly other software, dont play well with them, if you have it switched on, try switching it off.
what browser are you using? may need to turn off hardware acceleration in the settings.
Iv'e tried both Firefox and Chrome and i have experienced the same problem, any further thoughts?
Other than Samsung Customer Support, nothing I am afraid.
firefox, chrome and most other browsers use hardware acceleration. did you try disabling it yet? also reinstall your graphics driver and choose custom install, clean install.