With iOS 10.3.3, I have found my iPhone 7 plus keeps spring boarding randomly. I can't explain what could be causing it. It has happened while different apps are in function. Also differing from the past springboard crashes, when it comes back to life after the spinning circle is replaced by the passcode screen, I am able to use touchID to get back into the phone not requiring the usual manual entry of my passcode. Anybody else having this experience of have a fix? I have done net work setting resets and also power button + volume down button prolong press to reset with no improvement in the situation. These days the guys on the apple support app seem to know very little about the phones they advise people about. Ideas welcome. Not really keen on a factory reset