Some times things like that happen when you plug into shore power, disconnect from shore power or start or stop the generator. Always best to chech breakers and fuses first. I'm sure resetting that breaker at an RV repair place would have cost plenty.
2003 Winnebago Adventurer 38G F53/ V10 605 watts of Solar
1999 Winnebago Brave 35C F53V10 Handicap Equipped
1999 Jeep Cherokee, 1991 Jeep Wrangler Renegade and 2018 Chevrolet Equinox Diesel