iPhone 5 Power Button Issues?

Has anyone started experiencing issues with the power button on their ip5? The past couple days I have had an issue with the button working intermittently, and the weirdest issue, me pressing the button, and the screen turns of, but a split second later it cuts back on to the lock screen without me doing anything. I have had the phone in an otter box since I bought it, it's never been dropped or anything of the sort. I had this issue with my ip4 but that was after a drop, this just randomly started a couple days ago with no drops. Any thoughts or similar experiences?

soulreaver99 said:

I've had these issues too with the launch day iPhone 5. Just take it to an apple store if you are past 30 days if your return period and they will replace it.

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Mine would probably be out of that time frame since I bought it in early October, would they still honor it?

Also it doesn't happen consistently, so I'm afraid I wouldn't be able to replicate it in front of them for them to see.