Hey @Anthro I’ve moved your post into its own thread so that we can assist you with this!
In addition to the IGMP setting, could you please check to see that your device is on the latest firmware update? Auralic released a firmware update recently that I’m hoping you had a chance to install.
If that does not help, 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.
Thank you!