Unmuting on Ubuntu Linux 22.04 Does Not Work

I am encountering a weird issue with muting and then unmuting the mic when using the Zoom client version 5.10.7 (3311) on Ubuntu Linux version 22.04 (though this was also happening with version 21.10). Sound works initially, but if I mute and then unmute the mic, it doesn't seem to "unmute", and the mic is unusable. Manually selecting a specific mic in Settings doesn't resolve the problem. It does seem that it eventually returns to working normally, but I don't know how or why. I don't know of any command line arg that enables more thorough debugging, and the only log line that seemed relevant was "No PulseAudio daemon running, or not running as session daemon."

Is this a known issue? Is there any way to debug further?