Hifiberry OS channel limits not working

Hi Hifiberry enthusiasts,

since a couple of days I'm facing a small problem with one of my berries: I cannot set the channel limits or speaker configuration anymore:

This is really annoying since I'm using an amp box without volume control so whenever I start playback I need to be really quick to turn down the volume via the Spotify app.

This is my system setup:

Any hints on where to start debugging? Maybe a permission issue?

Thanks in advance!



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