Call control not working on Poly Headset

Hi, we have Poly Voyager 4230 UC headsets connected to Macs but the answer button does not pick up any Zoom Phone calls into the client. I've tried using bluetooth connection only, the supplied bluetooth dongle, the Poly Lens software as well, toggling the Sync buttons on headset option, but nothing works. Speakers and Mics work fine (but Mute on headset is not reflected in the client). I paired the headset to a phone and could use the answer button on the Zoom Mobile App on a Zoom Phone call, so the button isn't broken. This is meant to be a Zoom certified product so annoyed its not working fully.