Android version 7 (Nougat) has brought about enhanced power saving, making the "Doze" feature first seen in Android version 6 (Marshmallow) even better... However this can have adverse affects; especially if using apps with the screen off or in the background such as BridgeHaul.
You can customize which apps are affected by this doze feature by following the steps below:
1. Open the Settings app on your phone (Pull down the notifications shade, and tap the gear in the upper right corner, or find “Settings” in the App Drawer.)
2. Tap Device Maintenance / Battery.
3. Tap the menu button and choose “Battery optimization.”
4. Tap the dropdown menu at the top of the screen and select “All apps" or "Power Saving Mode" OFF
Now BridgeHaul will not be controlled by the Android system's power saving enabling it to run in the background.
For iPhone, go to settings and ensure power saving mode is not selected.
Keeping your mobile device plugged in and ensuring your battery level does not drop below 15% can also resolve this issue.