Hi

Got the same problem here. I started seeing that when connected to my MacBook Pro via USB-C HDMI 2.0 cable and I thought that it might be a cable. But recently started noticing same on my Windows machine (GTX 970) via provided HDMI 2.0 cable.

It happens on the left hand side of the monitor, even now when I typing this message. It looks like it is more happening when there are lots of white and black colours together. That is the only thing I noticed so far after just few days of that problem.

Firmware: M2C101

Update November 23 = I was fiddling with monitor settings and was trying to reproduce the issue (it happens only sometimes) although that day it was almost all the time, but after turning off DDC/CI (in Others tab) setting, it stopped.