I think we can rule out Contact sync at this point. Numerous users here and Moto forum have stated that Contact sync is On and they either don't have the issue, or it made no difference whether it was On or Off when they do have the issue. Three Moto customer support team has stated that they are "looking into it" which generally means they have been able to reproduce it and are working on a possible fix. That's not a guarantee, just what yhay generally means. I'm still leaning towards a common app that causes this to happen on some phones, but not all phones