This does seem odd. I’d certainly try to refresh the Sonos OS on both devices by power cycling them, and then checking for firmware updates in the Sonos controller. In fact, I may go as far as to reboot the router while these two devices are powered down, for good measure.
However, if this doesn’t work, I would recommend that you submit a system diagnostic within 10 minutes of ‘stereo pairing’ them, and call Sonos Support to discuss it.
There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.
When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.
Thank you Airgetlam, I’ll try your suggestions. I did update everything, which took some minutes, but I had the feeling that it went better. Okay, let’s try that tomorrow. Have a nice evening.
