Cannot listen to audio in Premier Pro

Sigh. I have go through the forums and tried many of the suggested approaches to listen to audio through headphones for Premier Pro. It works in Rush, it works in Audition, it does not work in Prem Pro. I can see the meter jump up and down (so the software thinks there is audio). The "Test Speakers" feature in Prem Pro works (I get noise generated on left and right channel) so it is able to use the headphones. I have tried different rates, I have tried setting input mic to "None", I have tried every combination of settings I can.

I am running 14.2.0 (build 47) on a Mac with latest OS.

I have never had this problem on Windows. I have to get the project done, so may jump over to Rush instead to get it out the door. But it seems crazy such a simple thing (listen to video on headphones) is so difficult to get working - and a frequent and long time issue in the forums from searching around.