I have had this problem since the IOS 7 upgrade and have submitted the problem to Apple and have been watching the discussions. I am so completely disappointed with Apple that instead of purchasing another Ipad to use at work, I purchased a Surface. For me, an person that truly has had a long standing dislike for Microsoft and a close relationship with Apple since the mid 1980's, it took some real "lack of action" on Apple's part to drive me away. Giving my Ipad away to the grandkids, who don't like having a camera, and replacing that unit with a different product like and android or another Surface.
Thank you Apple.....Not!