Telenor Denmark Technicolor TG788VNv2 compatibility
This router has a known issue that prevents it from working with Sonos. The solution below will ensure that this router will work with Sonos.
The Sonos app has trouble grouping and ungrouping Rooms, or loses connection to the system entirely.
Reboot the router to resolve the issue.
If the issue keeps happening, please contact Telenor for further assistance.