Sound Randomly Switches Output Devices or Goes Mute

For the past few weeks, my Windows PC has been randomly switching audio output devices on its own, often jumping from my speakers to my headphones or even to a completely disconnected monitor, and sometimes the audio just goes completely mute without any warning or error message. I've already tried updating my audio drivers, disabling exclusive mode, and checking the default device settings, but nothing seems to stop these random switches, so I'm hoping someone here has a fix for this frustrating issue.