Yes I have had the problem with the Schwintek slide on my 5th wheel. I had to push the sticking side in and out while opening or closing.I think it started because I had the the slide in a bind due to the way the camper was leveled. The motors will eventually resync themselves but it is annoying to have to assist them. I had to assist mine through 10 or so cycles. Don't waste your time trying to do the sync reset it will not help. They are not out of sync the slide is somehow in a bind. Is your camper on the truck with the jacks down? If so retract them and see if the slide works properly. If it is just sitting on the jacks; that may be the problem. It will work OK when on the truck. Good luck.