So I had a modell that I wanted to print without top layers and infill. And near the top of the perimeter there are "solid infill". They are one more layers if I increase bottom layers, so it would seem like the slicing thinks there should be bottom layers there. As other slicers seem to handle it like expected I know it is not the STL file.
Simplify3D:
Cura:
Slic3r:
