iPhone unexpectedly shuts down after I set a password.

Hi to you all,

My iPhone for some reason (I don’t know why) shuts down unexpectedly after I set my password and after I successfully set a password and the phone is back on it will start shutting down at a random time for a random time period. For know my iPhone is without a password (Which is not that save for security reasons) and it hasn’t shut down since the last time I trued to set a password.

My iPhone is iPhone 8 Plus running iOS 15.3.1.

If you have any suggestions please leave a reply.

Thanks.