Before running VLC I hear system sounds, e.g. a cron job has Biff barking each hour. If I then play a music mp4 with VLC, I hear the music, but when the music stops I no longer hear Biff. VLC inhibits system sounds, and leaves the inhibition in place. VLC -> Tools -> Preferences -> Audio -> Show-Settings=All has nothing to clear this.
Restarting sound.target has no effect. I have the same problem with mplayer. Is there some way of restoring system sound, short of rebooting ? Roger