Hi @florentnoel49, thank you for your response and welcome to the Sonos Community. I appreciate for detailing your concern in your post and for letting us know about it. Let me help you figure out what's happening.
I have got a few questions and will give some suggestions on some troubleshooting steps that you can follow.
- Do you experience the issue on a specific music service or on all your music services?
- Is the issue happening during group or individual playback?
- Have you tried rebooting your network and Sonos devices?
After performing the steps above and you're still experiencing the same problem please submit a diagnostic and reply back with the confirmation number. This will allow us to see how your system is functioning, and help provide a resolution.
If you have any other questions or run into any issues, please do not hesitate to reach out, we’re always here to help.