I have direct interaction with the Surface Engineering Team, it is a known issue with a couple of batches produced this past summer, it was a result of the bonding process of the screen that caused the LCD Crystal to get stuck. It does not impact every device, all of the Display Units found in Stores come from the earlier batches. You can believe what you would like, but it doesn't effect all of the devices.
That is actually great news, thanks!
I surely believe engineers more than support.
But I also honestly don't know what to do.
Should I keep exchanging? 6 units is a lot.
That's why I got so discouraged. Now you make me rethink...