Message received: Formatted for mobile viewing by Google.
Additional message: This page could not be transcribed due to technical issues.
They have a link at the bottom of the page to 'view page directly', but hitting that gets you nowhere (and when I used to do that in few and far between articles, it did go to the source page).
I know it's a Google thing and not GrazeRSS, but have you heard of it, and are you attempting a workaround for the Google madness?
Sadly, that happens sometimes. The only thing I can think of to try is to attempt to detect it and retry, but that's very unfriendly to the server. There doesn't seem to be much interest in mobile transcoders these days, but they sure are nice for this sort of thing...