If there was a shore power momentary outage then likely radios or microwave would be blinking. I assume you have set your fridge to Auto mode and your coach batteries are charged and use/store is kept on? The RV fridge requires 12vdc when operating. You could check the fridge gas burner area for loose debris, insect nests, rust flakes etc in case that debris is interfering with normal gas operation. In auto mode, if shore power and 12vdc are working the fridge should default to use the electric heating element automatically. If shore fails, the control board should start using propane to operate the fridge. Does the fridge check light come on when you switch from Auto to Gas (forced to use propane only)? Check the external fridge access area for loose connections etc. If all looks clean and dry you might have a flaky control board.