No, I'm not using the Blue Light filter. It has no effect on this problem anyway.
Again, this is not something a reviewer will notice unless they perform a lengthy in-depth review. Adam at PCMonitors.info does do an in-depth review, and he did notice this problem.
He talks about it in the supplemental 30-minute review video. He still didn't notice the problem as much as I did though because he didn't spend enough time with the monitor to notice just how bad this mesh and grid-like pattern problem really is.
The Tech Chap's review video above is precisely why I went ahead and ordered this monitor. If he had done a very in-depth review, then he would have discovered that this monitor is crap.