Yes, we had the same thing happen on our 2008 235RKS. We HAVE had to have the slide rails replaced since the first occurrence. I think that this is a weak system; not very robust. I go out and push from behind every time we bring the slide in while my wife pushes the button. I also go out when we extend the slide and help lift the back up at the end of the process. Doing whatever I can to nurse it along.
2012 F150 FX4 Ecoboost, 2016 Surveyor 274BHS
2003 Yamaha FJR1300, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs