Right this is just like mine it's so random.
I have a new vesa certified cable coming Thursday to rule out the cable.
You using 160hz mode? It seems to happen more for me in that mode.
Next step for me is turning off Freesync you using amd or nvidia?
I've not overclocked it to 160hz as of yet,
The monitor is using Adaptive-Sync which it's on Extended, I would think that it's using nvidia ( G-Sync ), seeing I'm using an nvidia GPU.
@Lostfaith
Another question do you have all the monitor software install? Display driver etc?
Do you have the USB connected to the pc from a monitor?
I did connect the USB from the PC to monitor and download all the firmware that i could but i don't know if it's been installed to the monitor, and i can't find out how to tell if the monitor has been updated or not.