Yes I'd be concerned. Possibly the biasing has gotten tweaked on one of the amps (the hot one). What does the manufacturer say? Good luck!
One SS amp running hotter that the other,. . .
should I be concerned? I have a pair of Classe CA301's that I bought at seperate times. I'm not running them in bridged mode. One seems to be quite a bit hotter than the other. Hot enough that you can't leave your hand on it for more than a few seconds. The other one is just very warm although not enough that you feel you have to pull your hand away.