Logging / mysterious ether disabled

I mysteriously had ether1 disable on my x86 RouterOS. When I looked in the logs it said, system info device changed. I then manually enabled it and the log said system info device changed by admin.

What kind of things might have caused it to get disabled?

Running RouterOS 3.6

I face this several times, how can i work around this ? T

hanks for you help~!

if you enable UPNP on your router, disable (Allaw to disable external interface)

Good, i found this service checked,thanks a lot