Ring doorbell speaker not working with Echo Show 5

I have just setup a new Ring Doorbell and a new Echo Show 5, along with installing the respective apps on a phone and tablet, plus linking the apps and accounts. Via the phone and tablet I can successfully have a two way convo with someone at the doorbell. Via the Echo Show, I can view the doorbell camera and hear someone speaking through it, but they cannot hear me speaking through the Show. This is both with the Mic enabled and disabled via the onscreen button on the Show. In short - confirmed doorbell speaker works if communicating via phone/tablet app, but doesnt appear to work if using Echo Show