At my previous airline, the philosophy was that, should a CB pop in the air, a reset could be attempted, on several conditions:-
- The service was essential to the flight
- It is only reset when needed - i.e. if it was for the gear, only reset just before wanting to lower the dangly bits
- It is reset only once
If non-related CB's pop as well, before reset, on reset or subsequently, then you've got a possible major situation on your hands.
IMHO, under no circumstances whatsoever should your FAs be resetting CBs on their own, flaps.