Help When I resume my phone, it often goes to a blank page and freezes phone

[unity04]

I'm experiencing something odd.. say I get a text message, and from the lock screen I go directly to the message, when I press the home button it takes me to a blank page on the home screen and doesn't let me click anything. To get out of it, I need to press the power button to sleep the phone momentarily, and then press the power button again to unlock it.

Is there a fix to this?