I use Rune for music. It takes Rune a bit of time to find its controller on the network. If, after starting some music playing, I then lock the phone, when I come back Rune starts all over to locate its controller. I had a similar experience with Sony's 'imaging edge' app for remote-controlling my camera. As soon the phone locked, I had to go through the elaborate connection process all over again.
Is there any way to change this behavior?