It seems when you're using the new call feature when it's speaking (tts) it's hearing itself as if you're talking to it. Which results in it cutting off the tts after a word or 2. Only happens when i'm using it like a speaker phone. If I have my headphones in it works great since it doesn't hear itself talking. I think you need to put in a way to prevent it from listening UNTIL it's done talking, then it can resume listening again. Otherwise the call feature works great, just this one bug so far.

Sorry I can't answer your question, but wondering if there is a trick so playback work.
I can engage in conversation with the model via the new call feature, it hears me fine, but I do not hear any response, but when I end I see the text response.

There are many ways to address that, but the easiest is using a programmable keyboard, "push key," to talk and release it to get the answer while muting the microphone. This is not the perfect scenario because we have to use our hands :) I agree with @hsman2, but I'm not sure about the complexity of coding that, as we would need to get the "end of audio" callback

I'm getting this bug also (MBP). Agree with either holding the mic button or controlling the mic sensitivity.

Updated with the latest!