I've seen this switch on an Aero Plus 8 (assuming the same) and it bears all the hall marks of a current triggered resettable circuit breaker. May have some bearing on random trips [Linked Image]

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone