We've put over 85K miles on between our '10 Montana, '12 Redwood RL, and our '16 MB and have never had a Microwave/Convection Oven door open or any problems with it's plate. Once in a while the plate may just off it's track, but that's it.
Now for the disclaimer: All three units were running the Mor/ryde IS System.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top