Android App Stops in Background

[smitbret]

My Blackberry PRIV runs Marshmallow 6.0.1. Mezzmo App works great until I open another app and Mezzmo goes to background when Mezzmo stops. Is there a setting somewhere that tells the system to run this app in background mode?

Regards,
Bob

Same phone, same OS version. If you mean that Mezzmo closes completely then I am not able to duplicate the issue. I still have the Mezzmo symbol at the top of the screen in the status bar and it appears in my list of opened programs when I hit the <Square>.