I’ve been wondering kind of the same thing. I can be using it and it will close the app and you can watch all the other apps click or flash on the screen like someone invisible to me is clicking to open them. On occasion it will even completely shut down my phone to where I have to reboot it not just like it goes to sleep due to inactivity. Sometimes After a short while of this happening my phone will start heating up to the point it’s actually hot, like when a computer is over it’s processing power. Then also there are times out going calls to my contacts will call other random people or businesses or give me an automated line about the number I’m trying to reach is invalid. I even had that happen and the scam calls I kept getting went to my mom we were just trying to meet up at the store and I couldn’t call her but I’d get scam calls, I find my mom and start to tell her what was happening with my phone and like magic her phone rings, she had the exact same number supposedly from a small country on the other side of the world, calling her like I kept getting. I could continue on I have a lot of strange stories like that written down (I learned to write them all down after I had my Apple ID apparently stolen and it took weeks to get the right person to look and see I’m on my iPhone with that ID talking to you while it says I’m in Europe, but being able to trace the store I bought it at, the fact they can get your phones location in real time, and see it’s the one I’m using at my home and I’m not in Europe!) that was awful and seriously took weeks and weeks of me trying to get it fixed.
