Roon and Fritzbox router conflict.
If you are using a Fritzbox router, there is a possible conflict between Roon Core and Remote, and the router, specifically when streaming Qobuz.
The Fritzbox setting "Software Packet Acceleration" triggers a connection problem.
Please follow the instructions on Roon website to fix this issue.
https://community.roonlabs.com/t/roon-stops-mid-qobuz-track-solved-fritzbox-firmware-update/64401/9