Why won't faceTime audio play through my HDMI connected speakers?

When I use FaceTime the audio comes out of my Mac Mini M1 speaker instead of the HDMI connected monitor speakers. I am running OS 11.6.4. I have the Output Audio in the FaceTime app set to Use System Setting. The Music app plays through the HDMI speakers just fine. This is not new btw. It has been happening through several OS releases.