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Answer for gdeconto :
(your comment is currently flagged for moderation. Not by me. Probably automatic feature, because you embedded a link to another site )
I really haven't noticed this before you mentioned it. This also happens in my slicer. I didn't have much time to figure it out. But if you disable (or enable, idk which one does what ) feature "detect thin walls" in SLic3r PE, then you get a better gcode. Although in this case you might get double line for each hair (depends on your nozzle size and extrusion width).
Try it and I hope it helps.