I've seen a couple other posts on here about this same issue, but nobody has really explained what it is or how to prevent it. I never used to see this in my slices, now it's on all of them. It jacks up my print time fairly significantly, and is also just unnecessary. Is this something that S3D added in an update or is this a setting that can be turned off?
It'd be great to get a real answer to this, as I know I'm not the only person experiencing it. You can see a recent model sliced in the image below, with two outer perimeters as expected and then the weird infill along part of the perimeter.