There have been many treads and posts on this same exact issue on multiple forums. Just search and you could read forever.
All I know is they do not build them like they used to. My 2011 unit has no such issues. No way I would trade it for a newer POS. Way too many issues being reported with the new ones.
2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS