2017 BC 3560SS Bed slide problem. Slides were fully extended. Tried to bring in the small bed only slide(electric), nothing happened. I confirmed the camper had power and tried the slide again. It finally engaged and started to slowly bring the small slide in but stopped. I put it out a small bit and tried bringing it in again and it moved but each side of the bed came in at a different pace and then stopped again. I continued to repeat putting it out a bit and bringing it in until I finally had it fully retracted. I noticed the left side was the last to come in. It seems to off center when extending or retracting. Has anyone experienced this? Recommendations?