Mevo has a feature that will automatically power down the camera after 15 minutes of inactivity. This means that if the camera is turned on but the app is not connected to it, Mevo will shut off on its own to preserve battery power.
You can choose to disable this feature if you navigate to settings, scroll down and tap Mevo Settings.
Scroll down to find an option for Auto Turn Off with a toggle switch to the right. Toggle the switch off, then close the settings.
Now Mevo will stay powered on until you manually turn it off.