Hello
I was trying many ways to export this font/pattern without success. Removing or not ovelaps in the app or when export.
When I try to use it is all broken. I also tried doing the font with just one glyph.
The fill stroke is 3 units.
I cannot reproduce the problems. The font exports fine for me and this is a screenshot from InDesign. Except for some grid rounding errors that cause the stroke to thicken a little in some spots, I cannot see any problems. Consider a higher UPM (2000 should suffice):