the adapter was fixed.

MvvmModifiedAdapter.kt

artistAdapter = ArtistAdapter(this@ChartIndexFragment, R.layout.item_artist_type_1, artistRes) { holder, item, _ ->
    // If a ViewModel doesn't exist, I will create a ViewModel.
    if (null == holder.binding.avm)
        holder.binding.avm = RecyclerViewSearchArtistChartViewModel(item)
    // Otherwise, I just reset the data to the ViewModel.
    else
        holder.binding.avm?.setArtistItem(item)
}