launch(UI) {
            val bitmapDrawable = loadLargeBitmapDrawable()
            imageView.setImageDrawable(bitmapDrawable)
  }

launch { // <- I removed the "UI"
            val bitmapDrawable = loadLargeBitmapDrawable()

            launch(UI) { //Launch the UI coroutine inside the other
                imageView.setImageDrawable(bitmapDrawable)
            }

  }

launch(UI) {
    val bitmapDrawable = withContext(CommonPool) {
        loadLargeBitmapDrawable()
    }
    imageView.setImageDrawable(bitmapDrawable)
}