Not getting notifications when in foreground #186

I made some tests and working with push-plugin or firebase plugin the notification is received (I can get the log in console) but not displayed in android shade.

Sending with google's firebase console or curl x post:

• notification is displayed in shade only in background mode;
• when in foreground mode I can only see the result in console.log;

Sending with php script:

• notification is NOT displayed in shade even in background or foreground mode (I can only see the result in console.log);

Is this a bug? It really should display the notifications in any case. Is there any change to be made in code? Some others platforms we can specify the behavior of the incoming notification.