Please attach a sample SVG file with your custom pattern which exposes the reported issue, to allow further investigation with different versions of Inkscape on different systems.
Is this limited to printing (on Windows), or does the same happen if you save a copy as PostScript (or PDF) via 'File > Save'?
If saving a copy as PDF works correctly, does printing the PDF file from a PDF viewer (e.g. Adobe Reader) produce the expected hard-copy?
Please attach a sample SVG file with your custom pattern which exposes the reported issue, to allow further investigation with different versions of Inkscape on different systems.
Is this limited to printing (on Windows), or does the same happen if you save a copy as PostScript (or PDF) via 'File > Save'?
If saving a copy as PDF works correctly, does printing the PDF file from a PDF viewer (e.g. Adobe Reader) produce the expected hard-copy?