I had this same issue with my SOB 5th wheel (not my CR trailer). Even had a local DISH network installer come look at it. He's seen this devices on lots of RVs and, in his words, they are all crap.
If you're not using the OTA antenna, bypass this switch and hook the cables directly together. If you need the OTA switch from time to time, get good splitters and hook them up so that they are available OUTSIDE of the wall/roof area so that you can get to them. It's not the most attractive fix but it will be functional.
Another thought -- has anyone seen an upgrade to these stock electronic OTA/cable devices? There has got to be something out there that we can use to replace the stock devices.
Jeff & Laurie -- Full timing in Rockport, Texas
Auggie (our beer-loving English Cocker Spaniel)
Angus (55 pounds of attitude in a 5 pound chihuahua body)
Our home base -- 2018 Grand Design Solitude 375RES -- The "Uno Mas!"
The mobile office -- 2016 Crossroads Hill Country HCT26RB -- The "Poquito Mas!"
Gone but not forgotten: 2015 Heartland Landmark 365 Key West (lost to Hurricane Harvey)