Hello.
Try deactivating Motorola Device Policy in Device Administrators in Security Settings.
If you have any downloaded app that installed itself as a Device Administrator that's not good. Android Device Manager, and Motorola Device Policy are there by right. I also have Outlook Device Policy there.
I am only guessing this as a first step.
It may have something to do with Lollipop.
I don't know what app cleaners, task managers etc you may have installed unnecessarily. They can cause problems.