@AaronB83
I am having the same issue even i am not in same network
i think this is happening throug direct connectivity to the device to device or blue tooth as i made a test using my w10 pc with out connecting to any network and its broadcasting to my TV through the intel wi-di connecticity.
the bad thing is LG doesnt have any control to block this kind of in coming connection
while connecting some body else, the tv will show a pop up message to cancel that connection
if we didn't cancel, it will automatically connecting to the TV