Oh I hadn't noticed that author middle name change... though that trimming of 'Edition' to ', dition)' did puzzle me.
I have this in save template: {author_sort}/{title}/{title} - {authors} , and just now I spotted this possibly relevant option: "Convert non-English characters to English equivalents" (it's checked).
Anyway, that "clearing" workaround seems enough for my current use. I loved that Prince is pretty fast and allows setting a transparent background for PDFs.