I just had this fixed by REV Factory Service in our end of warranty punch list.
There were two issues:
1. the slides were not level. The fix is to remove the door (you have to get up under the door with a small screwdriver to release the catches), and then remove/adjust/replace the screws to ensure the slides are level. If you have a loft bed, obviously it needs to be down to do this.
2. the wood trim on the loft bed was somehow interfering with our LH door latching in the closed position. They removed the trim, trimmed it down, and then reinstalled it. I didn't see which specific piece of trim it was, but they said they removed 1/2" of it!!!!!!
2018 Fleetwood Southwind 35K (aka Bounder LX) F53 22k
w/ CHF,Safe-T-Plus, UltraTrac Rear Trac Bar, Konis
+2013 Chevy Sonic LT hatch/Brake Buddy Stealth/BlueOx Alpha