https://bugs.winehq.org/show_bug.cgi?id=45417
--- Comment #14 from Silvan s.jegen@gmail.com --- (In reply to Silvan from comment #11)
I now tried another file containing not scans but jpgs resulting from converting an existing PDF. Those JPGs are very clean which means they shouldn't pose a big challenge for the OCR system. It turns out however that on Linux with Wine, while the text has been recognized correctly, some of the lines are missing the spaces between words for some reason. As far as I remember this is not an issue on Windows. I will attach the resulting .docx file and the original PDF file.
This is actually a false positive. It turns out that the output files seem to be identical from what I can tell. It's just that Libreoffice Writer, which I use on Linux to look at the .docx files, cannot properly display these files. The Windows and the Linix/Wine version actually look identical when viewed in Microsoft Word.