It's a common hardware problem in the M series. This is caused by errors in the motherboard.
The motherboard can be replaced by visiting any local Samsung service centre. But the problem is still there for the most part. Unfortunately, the cost of replacing the original motherboard is also going to be higher.
If you are not worried about the restart issue, I advise you to keep your phone the way it is. And it won't damage your Galaxy device.
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Hi... First, try to reset your device and check. If the issue persists after the reset, probably will be a hardware issue. In case, go to a Samsung service centre and check your device. Sometimes this could happen because of issue in motherboard.
