Sound issue in Hassio - can play only sound from one source

Raspbian and Hassio here - I have an issue with my external soundcard. I needed to setup dmix in alsa.conf in order to play multiple sounds from multiple sources in Raspbian. The thing is that when I play something over Hassio (Spotify connect for example) I am not able to run another sound in Raspbian so the dmix working only in Raspbian. Can somebody help me how to get it working even in Hassio please? My soundcard is M-Audio M-Track 2x2. Thanks!

Sometimes playing Spotify connect in Hassio and start of Kodi in Raspbian freeze the Pi. When Spotify connect is playing I am not able to use TTS over Mopidy etc.

Any help is appreciated.

Edit: raspotify which runs from console don’t work too. I can run sounds simultanously only on desktop - chrome, vlc, alsa music…