R52Hn stopped working in a strange way

Hello,
after about 2 months of normal use in station-bridge mode a R52Hn has stopped working.

The strange thing is that by doing a scan this detects the AP-Bridge which has always been associated, but there is no way to register it.

The configuration of the RB has never changed, I have also tried to reset-configuration both the RBs and configure its from the beginning but nothing, today we have changed it and the link is working again.

Is there anything we can do to make it work again?

cetalfio

Maybe it’s some physical damage?
Have you tried to use the card for some another configuration, for example just as simple AP for office use