Grab https://github.com/HiraokaHyperTools/SampleXpsDocuments_1_0/raw/refs/heads/master/Handcrafted/ResourceDictionary.xps and issue
$ xpstopdf ResourceDictionary.xps ResourceDictionary.xps.pdf
Error rendering page 1: Error rendering page /Documents/1/Pages/1.fpage: /Documents/1/Pages/1.fpage:12:124 invalid content in attribute 'RenderTransform' of element 'Canvas': {StaticResource Matrix2}
$ mupdf ResourceDictionary.xps &
$ mupdf ResourceDictionary.xps.pdf &
Observe that the images are not rendered at all or properly. In the screenshot in the attachment, the left document is the original XPS, and the right one is the converted one.