iPhone 6 iBooks Black Blank Screen Then Crashes
Iphone 6
8.4.1
Open iBooks and the screen is black as below. After a few seconds iBooks crashes out. If I restart the iphone then iBooks works again until I lock the iPhone and then try and reopen the app where it proceeds to display a blank screen and crash again.
I've tried a full restore using a backup and this made no difference.
It has only been doing this since the 22nd August 15 worked fine up until then.
iPhone 6, iOS 8.4, iTunes 12.2.1.16 on Widnows 8.1