My iPhone screen is staying on all the time?

My iPhone 6S screen stays on all the time even though it is set to stay on for 1 minute. If I get a notification it will stay on for hours. This just happened when I was at work and it drained my battery, anyone else have this problem? Tried resetting my phone and everything

There's a setting on the iphone that says low power mode I know if you have that on if it isn't touched for like 5 minutes it immediately blacks out until you press home or power screen again you could try that

WINDOS 98
WAS BILT
AS AN ALTIVE

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