In my continuing odyssey thru the net and contacting Thor I’ve found out that yes this is a known problem and the culprit is the Anderson valve 200RV-4.
That valve is a known problem and is now considered legacy and the associated panel is no longer made.
However!
there is a retrofit panel called the MANRV102-RF for the low low price of $219 to replace it, available as Thor part #0445086, currently back ordered at both Thor and ‘abcorv.com’.. sigh,
.