I've been looking at this one for several weeks now at varying dates.
When I look at Mav, I find that on the Sopron-Vienna route, I get only things involving at least one change, usually at csorna or Gyor. Except for the extremely early ones and one very late one, they all seem to be Railjet trains. OTOH, when I look at the return, I get what I expected Wien Meidling >Sopron at about hourly intervals with a time of about 1 hr 12 or 13 min.
Is something peculiar happening with Gysev (Raaberbahn)? Or is this just a glitch on the Mav website?