TiVo Sound effects

I had noticed doe some time (Roamio and maybe premier) that the fast forward sounds (named by us badup,badup,badup) is gone when you are getting audio from the digital optical audio out. It works when you use HDMI. I thought it was just the source, but I found today while watching a taped football game in quick play mode that when I fast forwarded, the familiar sounds were back.

Anyone else noticed this or figured out a way to get the sound effect back? It is the only TiVo sound that does not seem to work.