Disappearing Sound on Peacock

The only show I currently watch on Peacock is AGT, so don't know if it is specific to that show or the network. This has happened three times over the last few weeks. I'm watching AGT and mute the commercials. It will work as expected for a while, but then when I unmute, there is no sound. If I switch to another show, sound is normal. Rebooting the system does not help. After a few days, sound will resume as normal.