Report as inappropriate

Hello, I am trying to slice the STL files but with my version of slic3r the fore arm gear is not closed correctly when I turn the arm 180 degrees to reduce the amount of support material. You can see this in the attached screenshot (the slightly elevated hub top is rendered, but the infill of the gear isn't). In the 3d preview the structure looks solid as it is supposed (see the other screenshot). Is it possible to update the model so this is sliced correctly in slic3r?