Very strange as he clearly exceeded track limits there.
Ferrari continue their habit of screwing Quali for their drivers home race (Lec in Monaco, Vettel in Germany)
Maybe they are overheating the Softs and get along better on Mediums. We've often seen them being relatively better on harder tyres.
I doubt pretty much that Ferrari and RBR are having issues because they might have pushed their PU a little bit more. They know exactly how and when to push. I don’t think that today’s PUs are that unreliable.
all the manufacturers have put a substantial number of laps on the power units they are running currently. Not to mention they all put them through a lot of stress in Austria.