I know it doesn’t sound strange for many of us who is aware, but YES it does turn on by itself.
Any thoughts on this? 
Is that the doorbell or the 2k cameras?
Maybe u have a routine set uo within the app, u can set up days where u want the camera to turn it on or off.
One if my eufy2c cams simply turned on spot light in the middle of the night while I was sleeping. The cams are disactivated at night. Any thoughts on this?