I ran into a similar (but more serious) issue with my 2015 Bounder on some camping trips last summer. As we were preparing to leave camp, we discovered that the slide would not fully retract (short by about 6 inches). The slide was running into the ramp for the rollers. I called a local service provider and the solution was adjusting the level on the slide. I did not personally make the adjustment.

Unfortunately, the same thing occurred again on a subsequent trip. My final solution was to take it to the Fleetwood service center for resolution. 

There were two bolts where the slide connects to the slide mechanism and I believe a 3rd bolt that made the adjustment. Mine needed the adjustment on both ends of the slide. But you have to love the paint schemes to notify you when your off 8-)