Hello.

When I use a Cisco router or an old TP-Link I don't have this problem, with Deco after a few hours the problem occurs.

My ISP provides the WAN IP via DHCP6, and a /64 delegate prefix for the LAN, which I distribute on my network as SLAAC autoconfig.

Using a Cisco 1905 router or an old TP-Link, all devices connect to any Global IPv6 (in this scenario the Decos are in access point mode).

But with Deco as the main router, even though everything is configured correctly and the WAN, LAN and delegated prefix IPv6s appear in the app, any device on my network does not reach any Global IPv6 outside my network after a few hours.

Only after restarting the Deco returns to normal. But after few hours it won't connect any globally routable IPv6 again.