Hello @esko2953, welcome back!
I am sorry to hear you are having connection issues with your Sonos system.
First thing you could do as a troubleshooting step would be to refresh your network, by rebooting all networking devices involved. Start with your router → Sonos → Controller (smartphone / tablet)
Seeing in your Community profile that you have a Sonos Boost, I would suggest removing it from your Sonos System, as the wireless network capabilities of home routers has improved over the years.
Please have a look at our Support Article Switch Sonos between a wireless and wired setup on how to do so.
You can also check Reduce wireless interference as it is one of the main reasons for rooms dropping out in a Sonos system.
If you are still experiencing connection issues or require further assistance in order to resolve this, please reach out to our Support Team for live troubleshooting.
They have tools at their disposal to provide you with information and advice specific to your system and what it reports.
I hope this helps.
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