1) Could you attach the original SVG file (or a reduced testcase) + the linked bitmap?
2) What happens if you embed the image (Extensions > Images > Embed Images…')?
… and just to avoid any misunderstanding: this is not a bug with exported PDFs or bitmaps but a difference in rendering compared to other SVG libraries used by GIMP and Firefox?
1) Could you attach the original SVG file (or a reduced testcase) + the linked bitmap?
2) What happens if you embed the image (Extensions > Images > Embed Images…')?
… and just to avoid any misunderstanding: this is not a bug with exported PDFs or bitmaps but a difference in rendering compared to other SVG libraries used by GIMP and Firefox?