Question about being tabbed out on this game

I was waiting in my que for about 10 min in ranked decided to tab out and read the forums on stuff. I can still hear the audio of the main menu in my headphones of soldier just running and gunning and the background music. Heres the thing tho I went to the bathroom and when I came back i saw that the OW icon on my taskbar was flashing but in my headphones I never heard that the match had started so I never hurried up in the bathroom. Now i have a penalty so my question is this is there a setting I need to change so i can hear the match actually start if I am tabbed out? Or do I just never tab out while waiting on a que

EDIT so I found out I guess you have to run the game in Borderless windowed if you want to hear the audio queues of the match popping