This fixed it for me. I assumed it was something to do with my new watch. Thanks.
so had the same issue and found a solution that works for me on another site. Its acutally cause of my galaxy watch, anytime a notification comes through and Im on my phone and i flip my wrist the notification on my watch automatically opens the app on the phone. Its a setting called smart relay in the galaxy wearables app. In app go to settings/notifications//smart relay
... View more