Apps randomly starting on iPhone 6

My wife and I this last weekend upgraded our old iPhone 4S's to 6's. The transition has been challenging at best and a royal pain in the neck for the most part. I have my phone mostly working the way I want it to, but my wife's is being a nightmare. We are struggling to get her calendar to sync between her phone and iPad, but that is a different post that I am working on.

The latest problem is that when she plugs her phone in at night on the night stand and lays it down it suddenly lights up and randomly starts up apps that are installed. Sometimes it is an app that is in the background but most of the time it is an app she hasn't even opened since we restored her phone. I turned off Background Update (Because it was the only thing I could think of for apps in the background suddenly opening up).

Anyone else having this problem? I have been searching all over the internet to see if this is happening to others but it doesn't seem to be a big issue yet.

I have restarted the phone repeatedly, powered it off and on, reset network settings. I will try a Reset All Settings later.