When I try to charge my phone during either 12 noon or night the gallery tries to read all pictures and find faces in it but it stays like that until the phone gets locked and the device has the always on display on the screen which won't go and finger print icon won't come, when tried to press power button it shuts down and showed your Android is corrupted and gave 2 option.
Try again restarting and erase all data.
I tried restarting and worked but the theme went back to the orginal one which was given by default.
