Apple iOS bug investigating around battery percentage iPhone

There is an error in the software for the iPhone 6S and 6S Plus with the device not properly reflect how long the battery life.

It is specific to the battery percentage above the screen. This is 'stuck' by which he no longer accurately reflect the correct percentage. The problem can occur when the zone is adjusted in the settings, as well as the user does it manually or the phone itself does this automatically.
The error is manually corrected by restarting the phone, and set the time zone setting on 'automatic'. This option can be found in the settings under 'Date and Time zone 'in the' general '.