Since a few days the router suffers from intermittent disconnections, the network interface reset as I can see from the logs.
FW ver.: 4.6.2release1 but happened on the previous version too.
I did downgrade + full reset then upgrade but I experienced the issue in both cases.
Also used newer ethernet cable just in case (although I take good care of my equiment so this shouldn't be an issue)
edit1: the issues happens both wired and wireless (5GHz)
I have the same router with the same firmware. After reading your log, I believe it's the same issue I'm having, the router resets/crashes when I'm viewing images and went back to normal after a few seconds. And it only started happening a few days ago too.
I made another tech support post and will check back here for answers.