Hello Pete Singleton via groups.io: Thursday, September 2, 2021, 12:43:23 PM, you chiseled out:
I have a PC with Win10 Pro 64bit. I use WSJT-X (now v2.4.0) for FT8. I connect to my radio (various Icom, Yaesu) via an USB 'Audio Codec'. The cabling is stable - I don't replug my USB ports.
This is happening to me, mostly with my Yaesu FT-450. The audio path ends up on the display's audio codec "usually" ...and randomly throiughout the day. thanks for writing this up.