Video Doorbell Pro has stopped activating mechanical in-home doorbell

Hello, I have a Ring Video Doorbell Pro that was installed about 7 months ago. Recently, in about the last month, it has stopped activating our in-home mechanical chime. Thinking it was something wrong with the wiring, transformer or chime itself, we had an electrician come to service. Turns out everything non-ring is fine, and the problem is with the Video Doorbell Pro itself. Electrician verified all working by contacting the two wires that complete the chime circuit at the Doorbell Pro and the chime works. I have verified the Doorbell Pro is up to date on firmware, and the Doorbell Chime Type is set to mechanical and turned on in the settings, as it always has been. Any suggestions?