Having the Schwintech slide system on our 2013 CR ST 32 RL 5er, I've had the same problem you are experiencing with both our main slide and kitchen slide. I went on line and found a Youtube video to resetting the slide controller. I've had to do this several times now, about the process is simple to do. A reset solves the slide problem and the slide behaves normal again.
2015 Ford F-250 SD 4X4
2013 Sunset Trail 32RL 5th Wheel (no longer own)