We know Rohrbaughs are designed to work flawlessly when fired from room temp, and we are cautioned not fire it in rapid succession so that it gets too hot.
What happens if it gets too hot?
Mine has had the hammer slip off the sear trigger bar early in the trigger pull, with the hammer retracting to the at-rest position as the trigger goes fully depressed. Only occasionally, and only after a couple magazines have fired with no malfunctions. Releasing the trigger will put things back to normal, and a second shot is usually successful. There have been a few times it has failed twice in a row. When at the range, I practice with multiple guns, so the Rohrbaugh has time to rest between firing a mag or two at a time.
I haven't heard of this happening with anybody else.
What do the eggspurts say?
Is this an overtemp issue, or is my R9 in need of a visit by somebody smarter than I?