Just to be clear: the audio is only bad on the receiving end of the Ring Doorbell device itself. So: the sound coming from the doorbell speaker is not audible and you cannot hear what is being said from inside the house. Audio is fine on the Samsung, Huawei or website. And yesterday I also had Ring Customer Service test by adding them as shared user and the audio was still bad on the receiving end of the doorbell.
It seems the speaker on the doorbell is broken.