Two-Way Audio on the V3

What happened to the 2 way audio without having to hold the mic button? This used to work when I first go the V3 now it’s acting like a v2 what gives? I know I used to be able to hear through the camera and talk to the person on the porch without a problem.

A little more detail. When I click into the camera I can click on sound and I can hear what’s going on. However as soon as I click the microphone I cannot hear. Both icons though are green and the person on the other side of the camera can here me, but I cannot hear them. When I mute the mic both the sound and mic mute.