I'm currently playing online and in my horde base i've got a few electric fences. If I walk through one of the active electric wires from the fences I get a nullreferenceException. And, if you get a NullReferenceException the console pops open. So guess what? You've got a game breaking bug because you're stuck in the electric fence, being electrocuted, and if you close the console it opens again because the exception happens when you're electrocuted.
Here's the error from the log file:
Same error seems to happen while zombies in horde night walk through the fences, no idea how that error gets triggered at those points though. If I know more, I'll update this thread. But currently, this kind of breaks my game. Only thing I can do is remove my defences...