Thanks for reaching out, @Magnus!
I’ve moved your post to it’s own thread so we can take a closer look. 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.
Have you tried giving Google DNS a try? We’ve seen similar reports improved by using it.
Can you also verify that TIDAL is playing fine outside of Roon on the same Core machine?
Thanks,
Dylan