I'm experiencing the same issue. I've had the slide fail to retract on two trips this summer (I'm $400 into getting a mobile tech to get them back in). The slide moves about 4 inches then runs into the ramp (the scary part is the metal plate on the end of the slide arm that keeps flexing about 1/2 inch each time. The first mobile tech readjusted the slides pretty good to resolve the issue until my second trip following his adjustment.
I'm scheduled for a November appointment in Decatur.
I'd be interested to hear whether either of you gets it resolved and what the cause was.