Ring pro doorbell chime buzzes at night

Ring pro doorbell chime (hardwired) buzzes intermittently but constantly in the evening/night. Very bothersome. Mechanical chime, mechanical chime setting is on and the night vision setting is off. Help?

Hi @user27166. What is the voltage rating for the transformer this Ring Pro is hardwired to? While it’s buzzing, if you disconnect power, does the buzzing stop? If so, you may need to contact a qualified electrician to inspect the circuit.