phone freezes during use if phone call comes in

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http://androidforums.com – i can only assume its an issue because of something ive done. right now im on aokp b21, nova b13, franco 15 and a transparent nav bar mod. has anyone experienced an issue similar? everything is fine, but if im using my phone and a call comes in, the phone freezes on the call answer/cancel screen. i have to press the sleep button twice to sleep and wake up the phone, then itll let me answer. (General)