Icon notification missing on some Android devices

Hi,

Some users complain about the icon in the notification bar not present in the last release of my app.

Have to know that with 1.1.0 release, Ionic deals with "resources" folder in order to provide the various icon.png.

I had provided EVERY size of the icons: (like the config.xml file shows)

        <icon src="resources/android/icon/drawable-ldpi-icon.png" density="ldpi"/>
        <icon src="resources/android/icon/drawable-mdpi-icon.png" density="mdpi"/>
        <icon src="resources/android/icon/drawable-hdpi-icon.png" density="hdpi"/>
        <icon src="resources/android/icon/drawable-xhdpi-icon.png" density="xhdpi"/>
        <icon src="resources/android/icon/drawable-xxhdpi-icon.png" density="xxhdpi"/>
        <icon src="resources/android/icon/drawable-xxxhdpi-icon.png" density="xxxhdpi"/>

What could be the reason ?

On a Samsung S5 I have the icons, on a Nexus 5 or Xperia Z3 not.

Thanks a lot