No sound when using Push plugin

in My app I am using Push plugin to receive notification. Everything works perfectly except notification sound.
For my settings I am using common code from documentation:

 const options: any = {
            android: {
                sound: true,
                vibrate: true,
                clearBadge: true

            ios: {
                alert: true,
                badge: true,
                sound: true,
                clearBadge: true

        const pushObject: PushObject = this.push.init(options);

Is there something I should change to have sound working?

note: in phone in settings are notifications enabled including sound

on which device are you testing?

I am testing on Android 8.0.0 Huawei P9 lite 2017 and on latest iOS iPhone X. On both, there is no sound :-/

No one with this same issue?