Hi, I've used this extender for some time and it has worked fine, connected to a Fritzbox router.  Recently, we upgraded to a full fibre connection, and have been experiencing a problem.  IT is intermittent....  but we find that when the extender is connected, we cannot access some websites if connected to the router.  If I connect to the extender wifi, I can see these websites (eg BBC iplayer etc).

To summarise...  with the extender disconnected, the router will find any website.

With the extender active, some websites are unreachable via the router, but available via the extender.

This issue has cropped up after we upgraded to full fibre.

Grateful for any advice, thanks...