Iphone 8 keeps tripping off and on

As of a few days ago my iPhone 8 keeps randomly restarting throughout the day. I’ll open safari, messages or will simply be on the home screen and the iPhone restarts. This usually happens even when i still have much battery level but constantly it might go from 70% to 10% all of a sudden. I’ve tried resetting my iPhone to factory setting, resetting all of the settings, doing a hard restart, getting rid of apps I thought might be causing it, I’ve tried it all and my iPhone is completely up to date on the latest iOS. Does anybody know what’s happening and why it’s doing this? Thanks