I'm happy with the status quo. At the end of a working day, aside from the desire to manually shut the process down in order to go home for supper, it's not that critical. A way can be found, probably, to shut the machine down safely. Supper probably won't get cold. If the circuit breaker is being told to trip by a protective device, however, the consequences may be a lot more unhappy.
Protective devices can take many forms, but ultimately, they almost all provide a safety function.
Electrical protective devices may be overcurrent relays, differential relays, ground fault relays or any of several others. The most common cause for circuit breaker malfunctions is dirt. In spite of the fact that circuit breakers don't have any continuously moving parts - nor, for that matter, any continuously energized parts, other than the main current path there are parts that must move during the closing and tripping process. In fact, there have been cases where the mechanism has been so sticky that the trip solenoid has not been able to move the trip bar and has burned itself out while trying. There have been other cases where the breaker had tripped successfully, but failed to latch on the next closing attempt because the parts that were supposed to move to latch the breaker were so dirty that they couldn't.