Total sound failure after playback-firetv

After switching from v20 to 21 I now get a total sound failure after playback finishes, even after stopping kodi the sound is cutting in and out on the fire tv and needs a reboot to fix.  This occurs about 80% of the time, sometimes its fine and seems to depend on how the playback was stopped, if is was paused it always fails, if it runs to the end it sometimes works.

FireTV 4k max in pioneer AV amp, same problem on different firetv stick directly in different TV.

Log shows stopping that worked, then stopping that caused a total sound failure
This is running on a nightly build, as a very similar error was said to be fixed in a nightly, but didnt help here.