My front bedroom slide on a 323LKTS did the same thing. There is a wire that is connected by a usb looking connection that runs to the motor. The dealer told me it often times gets snagged when the slideout moves in or out, and the power to one of the motors is cut as a result. They told me it was a "common" problem with the front slides. I had them extend the wire, and secure the connection with tape in hopes it doesn't happen again. Good luck.
2015 Eagle 323 LKTS
2003 Ford F250 7.3 L Diesel