yeah it is very likely dying on you.
and most likely it is a board or two.
not the controller.
definitely possible that the board is dying but for now it seems to be working from the local side, so i was wondering why the pool side hr hadn't moved. but it's slowly coming up now (>10.5TH/s) so the number on the workers>>workers page of kano.is must be a little bit longer average than what i expected.