Using a Motorola e5 Play with OpenVPN to make a connection to my house and then firing up the TeamSpeak App to make a connection to the Team Speak server at home. When the phone goes dark into lock mode I lose connection. When the phone is not locked I don't lose connection. This doesn't happen over my home WiFi at all. Just 4G. I tried messing with various sleep settings to no joy. I need to keep the phone display on otherwise the connection is dropped. How do I remedy this?