video playback stutters/freezes when set to full screen

After update and upgrade to Ubuntu Jellyfish,video editing playback begins to freeze when switched to full screen. Exiting full screen.. playback goes back to running smoothly.(video editing software = Lightworks).
How can I fix this?

Without you reporting your CPU and graphics hardware info, only the clairvoyant would be likely to be of help. I'm not sure there are any such people here. Try pasting here inxi -bGaz input/output to give people a chance to help.