drekin
It seems that SumatraPDF doesn’t show some metadata when supplied in XMP Metadata packet as is done in PDF/A.
For example, if I generate ordinary pdf by pdflatex and supply metadata via \hypersetup, Sumatra shows both title and author, but if I use pdfx package to create a PDF/A document, only title is shown. In another pdf reader, the author is shown as well in this case.
