Reports

I suspect that when you are setting the Icon in "displayNotification()" could be the culprit

private fun displayNotification(){
...
// set the small icon using the Icon created from bitmap (API 23+)
        builder.setSmallIcon(Icon.createWithBitmap(bitmap))
            .setContentTitle("Simple Notification")
...
}

it looks like your createWithBitmap() function could be repeatedly called by the builder, maybe assign Icon.createWithBitmap() to a variable outside of the builder?

ie:

val bitmapIcon = Icon.createWithBitmap(bitmap)
builer.setSmallIcon(bitmapIcon)

[im guessing a little here, im still learning kotlin]

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