This problem is starting to drive me crazy. If a notification comes in while the iPad is asleep, it turns on and goes to that app - and on days when that happens a lot, it actually affects my battery life!
I think the culprit may be nolockscreen - do all of you have that installed? I'm assuming that the iPad tries to display the notification on the lock screen and doesn't know what to do otherwise. I wonder if the dev of nolockscreen could fix it.