Ring Doorbell wired : Not able to hear to voice from doorbell

Hi there !

thank you for the great plugin an support. I'm getting the following issue :
When doing Two Way Talk via the HomeKit app, I can talk and be heard trough the doorbell, however I cannot hear when people are talking, i only hear white noise. 

Environment

Ring Camera: Video Doorbell wired
OS: Headless Raspbian
Node.js: 14.16.0
NPM: 6.14.11
homebridge-ring 9.19.0
hoobs 3.3.5
Network Environment
Homebridge server is a Raspberry Pi 2 (B) and is connected via ethernet. 