Sorry for the trouble, @Cezary_Potocki
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Is there any change if you reboot the Core?
Can you also try completely signing out of TIDAL in Roon and signing back in?