I have an 6s with iOS 11.1.1 installed. I was just using the flashlight and it automatically turned off after two minutes. After it turned off I turned it back on and it’s still on. Is this a bug?
Sounds like a battery saving feature. I suspect it's to help where the flashlight has been turned on accidentally and not been noticed. So it's turned off after two minutes, however if the user then turns it back on it shows it was required and so is not turned off automatically again.