Every day the system seems to reset, and all cameras start recording

Every single day, or close to it, the system suddenly announces "Alarm off", even though it was already off. All cameras turn on, and start recording for a bit.

What is happening? This seems like a very high risk of privacy problems. What if I was walking around naked in my house?

Like I said, this happens approximately once a day. There's no annoucement of lost connectivity, or wireless interference. Just out of the blue it's restarted.

To be clear: I want it to not do this. Why would it ever start opening the camera shutters and record, when in "Off" mode?