Before anyone tries to dismiss this question, I know of a identical thread, but that question is too specific about a certain behavior following a user interaction with the phone.
I am in search of a general explanation and solution!
The phone of my 11 yo child is a Huawei P8 Light, which made an automatic call, without any interaction beforehands. At 6 a.m. today my wife heard voices and thought she is crazy, but she could locate it. She picked it up, removed the loading cable and saw, that the child's phone called someone of the contact list!
My child cannot install anything without a technical permission (Google Family Link). Before I gave the phone to the child, it was wiped and reset by myself to factory settings. All updates are installed, including firmware updates.
What exactly does cause this behavior and how do I prevent it by some setting?
I do understand technical explanations (I am developer).