So, according to Evernote support, this is not a bug:
When I print a note, the title isn't printed or turned into a PDF.
Apparently, this is a feature – or a feature which was eliminated in the recent Evernote software version. And I don't understand why one would do that. Apparently, there have been a few users here in the forum, which expressed the wish to not see the title of a note when printing it out. But I believe that for the vast majority of the users, the title of the note is essential information that is just part of a note.
Evernote could have responded to this by giving users an option to print or hide the title in the print menu. But apparently, this didn't happen.
So here's my feature request:
Please let us print the titles of notes again or at least give users the option to print the title (similar to the print header option). Please reconsider your decision to make the title unprintable.