I'm currently developing some Unity project(this is my first one, I'm not familiar with Unity) and what bothers me is that breakpoints are still hitting when I minimize Unity editor window although I have Application.runInBackground == false so the app should be suspended while in background, but it is not ! Only the UI gets frozen and music stops while the actual code is continue executing. So, I'm basically wondering if this is general behaviour or this only happens when you're running in editor to allow debugging and in release builds code execution stops ?
I had similar issues. I found that it is because I have an IDE attached to Unity and only then did this happen. When you switch to release mode, everything go as it's supposed to - debug mode in Unity.
Did you try changing it in the editor? go to Edit -> Project Settings -> Player. The inspector pane will now change to show the player settings. Look for the option that says "Run In Background" and uncheck it. From what I understand Application.runInBackground == false more of pauses it than stops the script from running. If your project is for mobile(or maybe just add this anyway, it might help),try:
RuninBackgorund is ignored for Android and IOS how you can see here
The only and efficient way to run in background on Android is through a Service. You can use OnApplicationPause method to get notified when the game pauses/unpauses.
public void OnApplicationPause(bool paused) {
if(paused) {
// Game is paused, stop service notifications.
} else {
// Game is unpaused, start service to get notifications
}
Here you have a nice tutorial about communication between android and unity