Why is this happening to my iPhone 5s?

Sometimes when I'm in the messaging tap it will freeze. It will stay like that for about a min then continue to work like it did. This only happens while in my messaging tab.
Why could this be happening?

Its an iOS 7 bug check below to revert it
http://wizdroid.blogspot.com&…
http://wizdroid.blogspot.com&…
http://wizdroid.blogspot.com&…

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