Google Music Player suddenly stopped appearing on notification bar when song is playing

A

AC Question

Hello,
I don't quite know the exact time it started but...
Lately, when I am listening to music, the music player bar on the notification bar doesn't appear.
Before, because the bar is there, even if I close the app, the music continues to play.
However now that the bar is not there anymore, if I close the app out of habit, music pauses. Which then, I physically have to go back and open the app and press play again...

Is there a way to bring back the bar in the notifications?