Hi @Rene_Snel,
It sounds like this issue only affects your Devialet zone while paying in Roon Ready mode. If this is the case it is a known issue, please see John’s post here for more information:
Specifically, the following information is most pertinent:
Bottom line: This issue can only be resolved by Devialet. We have offered our technical assistance to their team. We plan to reach out with further technical feedback with hopes that we can assist their investigation and expedite a fix to affected users.
In the meantime, our recommendation for users experiencing this issue is to use the device’s WiFi connection if possible. Some have reported that placing Expert Pro behind a 100mbps switch enabled use of Roon Ready playback without encountering the slow media error, however this “fix” is not endorsed by the Roon team as we cannot guarantee this will resolve the issue.
I would try using your Devialet via WiFi to see if there is a change in behavior. Thanks!