Plug your headset out and back in, confirm the headset is present in ALSA but not pulseaudio and kill pulseaudio: pkill -U $USER pulseaudio. Pulseaudio will restart itself automatically.
All audiostreams currently active will break, but pulseaudio is restarted and should recognoze your headset again.
Also, this does not happen with Ubunutu 20.04 on my laptop (yet).
Plug your headset out and back in, confirm the headset is present in ALSA but not pulseaudio and kill pulseaudio: pkill -U $USER pulseaudio. Pulseaudio will restart itself automatically.
All audiostreams currently active will break, but pulseaudio is restarted and should recognoze your headset again.
Also, this does not happen with Ubunutu 20.04 on my laptop (yet).