Right after iOS 11 installed, my iPhone turned off and showed the battery sign. It had 20% and was charging. It happened at least 5 times, but after 3/4 hours of installion it’s gone. Now there’s a new problem, sometimes the battery discharges while charging. So now I have to check everytime if it’s really charging, if it’s not, keep replugging the charger until the battery percentage starts ascending. Anyone seeing this?