Just a thought, the dealer probably had it parked nice and level, whereas you might have been at a "real" site where it was not so much.
Certainly, the frame / shape of opening will distort, even if only slightly, depending on angle parked at, whether chassis is "level" etc.
The extra torque required in the non-optimal position, would increase the current drawn by the motor(s) and could pop the fuse.
Our slide and awning are both "sensitive" to just this effect, can hear clear difference in how hard the motors are working, depending if jacks are down and "level" or we are just sitting on the tires/suspension.
Jeff and Abby
Fur Babies - Xandra Sophia (GSD) and Neo (Min-Pin Mutt who thinks he is a cat)
2015 Tracer Air 235 (previous 1994 Veri-Lite 1130 TC)
1998 Dodge Ram 2500 Quad Cab - 360 - 46RE (Built)