Mac mic not working in FaceTime only

I have an M1 Mac Mini running Monterey 12.6. I have external bluetooth and USB mics hooked up. These mics work fine in quicktime, system preferences, zoom, and all other apps, but they do not work in FaceTime. I can select the different microphones, but during a call, the soundwave indicator is flat and the people on the other end hear silence. Facetime is not switched to "mute". How do I fix this?