Problem with local notification

Ionic Framework ionic-v3
1

Hello There

I have a problem which i couldnt solve

let time1 = new Date();
time1.setHours(2);
time1.setMinutes(8);
time1.setSeconds(0);

this.localNotifications.schedule({
        id:1,
        title: "test",
        text: "I am tester ?",
        at: time1,
        sound: "file://assets/sound/speed_camera.mp3",
        every: "hour",
    })

When the screen is locked it doesnot pop out .After the time passes over the scheduled time when i wake up the screen, Notification pops out

Any idea whats going on ?

Thank in advance