Thor Pinnacle losing power for a few seconds

[PDXcamper13]

Hello. We have a 1999 Thor Pinnacle with less than 50,000 miles that has been driving great since we bought it a couple years ago. Last weekend, we were driving home from a camping trip and the vehicle started to lose power all of a sudden, felt like it was going to stop running. Dan was driving as it had slowed way down & he shifted it into neutral, then back into drive, then the vehicle drove normally the rest of the way home. We are in Oregon and had been climbing and descending some hills on that trip, something our RV usually handles very well. He felt like it has to be something electrical because if it was the transmission, obviously problems would have continued. Has anyone ever had this happen? Any ideas on what the problem could be?