In iOS 8 you can get to things in hand off from the opposite side of the apps in multitasking. It appears this is not the case in iOS 9 (beta 1). I used this all the time in iOS 8 and I think it would be a stupid thing to lose. If you can't get to it from multitasking you have to lock your device every time you want to open something with hand off. That just doesn't seem right to me.
iOS 8 Hand off in multitasking
Lack of hand off in multitasking on iOS 9
iOS 8 Hand off in multitasking
Lack of hand off in multitasking on iOS 9