Hi, 

I had encounter this random reboot issues on my units. I had contact several time to the ISP and they had replace a few time modem. And now they asking me to checking on the router side. But I can't. Every reboot will cause the log missing. How its possible to let user to get the logs when TPLink reset the logs when reboot.

I hope TPLink can be fix this asap. And FYI, THIS is not a cheap router but working like low end router.

The network topology is as below.