Thank you posted on there. Hope they get this sorted drives me insane.
So after some playing around, it seems, for me anyway, it's GSYNC causing the issue with the flickering. I am running at 144HZ with GSYNC off, fixed refresh rate set in NVid Control Panel and all flickering has gone. It also goes if you choose ULMB mode. GSYNC on and its back. I get it an awful lot on loading screens, Overwatch and WOW just 2 of the culprits. Now set to GSYNC off all is well. So glad I paid the premium for a gsync monitor and have had nothing but problems with the technology ever since