Hmmm... That isn't one of the issues discussed in the Service Manua
l. I guess I'd start by disconnecting the connectors on the control panel, spray with contact cleaner, and reconnect. If that doesn't change behavior, I'd go through the steps in the manual to see if it's something other than a bad control box. (my first suspicion) They repeat often that bad ground connections can cause issues, also bad solenoid valves. Make sure all buttons are 'up' and none are stuck in the 'on' position.
You could try to get help or referrals through Winnebago for someone who might know, but it's not a 'normal' issue.