Roy, although a few years apart my owners manual says that if you depress the 12V disconnect switch for more than one second it will permanently disconnect the batts and you have to reset by disconnecting the ground at the house batteries. Not good at electronics but sounds like a different switch would work better…i.e., momentary contact switch.
Maybe yours works the same.
2015 Jayco Seneca 36 FK
2016 Jeep Wrangler Unlimited tow
2010 Tiffin RED 36 QSA - gone
2011 Monaco Monarch class A - gone