Roku TV sound mode & volume mode broken in OS 12

55S515 / 7118X / OS 12.0.0 build 4182-30

The various sound mode and volume mode options do nothing anymore except disable the menu sounds. They no longer have any effect on optical output or headphone output. It's very irritating to be constantly holding my stereo remote and adjusting the volume while watching videos.

Please fix this ASAP! Thanks.