They swapped the monitor. Replacement arrived today and the issue is resolved!
This one is driving me crazy. I received the AW2721D today and there is a horizontal line across the center of the screen when there is movement on the screen or contrasting colours such as black text on a white background. It is as if there is color bleed across this horizontal line. I have connected 3 laptops, tried 4 HDMI cable, reset the monitor and tried the self test. The self test passes as the background color during the self test are uniform so as there is no contrast, the line is not visible. I have updated the Win 10 drivers for the AW2721D and I am out of ideas. Anyone else seeing this or have a solution? I'm going to call Dell tomorrow to see what they say but I can't use this with this line visible in so many situations.
AW2721D, one horizontal line across the center?