I use LyX 2.3.1 on Windows 10, 64 bit. It seems like LyX sometimes has problems handling SVG files, specifically lines with arrow heads.
Here is one example; the original file in Inkscape: [cid:image003.jpg@01D4833F.16CE63B0] In Inkscape, this looks fine. However, when I import this svg file into a LyX float figure, this is what it looks like: [cid:image004.jpg@01D4833F.16CE63B0] Observe that some of the arrowheads seems to have a “broken neck”... If I generate a pdf from Inkscape and import the drawing as a pdf into LyX, then there is no problems. But then the preview in LyX looks pixelated. Q: where is the problem? Is it Inkscape that uses corrupted svg files, or is it LyX that doesn’t properly handle arrow heads? -B