Sonos speaker lose conmection

I got 3 Sonos speakers, all working good and can be pinged and accessed on their web server. But for some reason the players are not usable in HA anymore. If I reboot the speakers they automatically come back into HA for playing media / notifications tts.

But after couple days the speakers just go missing again in HA.

This is in log:

Unable to find service media_player/sonos_restore
What could this be?