USB interface: Mixer controls out-of-sync?

Hi all,

after connecting my USB interface (Focusrite Scarlett 6i6 1st Gen), the alsa control element values reported by libalsa are not in sync with the hardware.

For example, the "Master 1 (Monitor)" control is shown as muted, but a signal can be heard. Unmuting changes nothing, and muting again disables the signal. In practice I often have to go through many controls and alter them a little to synchronize alsamixer with the actual hardware settings.

Is this a known behavior?

Kind regards, Tanjeff