Application closes when resuming

Hi everybody!

I have experienced this problem in Android devices at the moment... When I am playing my game and I press power button (the button to suspend the device) and then I try to run the game again I find that it doesn't resume, it has been closed and is launched again.

I have tried to find some related info and I found that Unity is supposed to do this "app resume" automatically but in this case it does not. I have not found either any way to configurate it.

Thanks in advance for your help