Normis are you sure that 4.10 has fixed this issue.
I have several 411 series boards that are affected. The other day a CPE lost registration to the Eth1, I upgraded to 4.10, rebooted (remotely), But only intervention from the client by way of removal of mains supply cured the problem.
The affected clients are loosing confidence since some of them have voip phones and are wondering how many calls they are missing! whilst the eth is down.
I have seen the Wlan behave in the same way, however in this case, no loss of registration, but simply “missing” altogether.
PS. CPE running in Pseudobridge mode
Simon