android Glide resource is ready but image not showing

use glide to load image on a recyclerview imageview item. impelemented glide listeners i realized that image resource is ready, but image not showing in imageview. when i add imageview.setDrawable(resource) inside glide listener onResourceRady ,then image shows up but in normal not showing here is my code i appreciate any help.

GlideApp
        .with(this.myContext)
        .load(item.add)
        .listener(object : RequestListener<Drawable> {
            override fun onLoadFailed(
                e: GlideException?,
                model: Any?,
                target: Target<Drawable>?,
                isFirstResource: Boolean
            ): Boolean {
                myContext.toast("error:\n ${e?.causes}")
                return true
            }

            override fun onResourceReady(
                resource: Drawable?,
                model: Any?,
                target: Target<Drawable>?,
                dataSource: DataSource?,
                isFirstResource: Boolean
            ): Boolean {
                myContext.toast("resource ready")

// holder.img.setImageDrawable(resource) return true } }) .error(R.drawable.neterror) .into(holder.img) }