submitList() in recyclerview with diffutil causes recyclerview to blink

I have a recyclerview that's been updated from remote source ,so it is working pretty well , the only annoying thing is that when the screen is pulled for a refresh and a get request is triggered the recyclerview is updated even though nothing has changed in the adapter causing the screen to blinks and that's annoying.

i tried messing with the diffutils but no result achieved

in my main fragment:

viewModel.fetchTopHeadline()

followed by an observer

 topHeadline.observe(this@FeedFragment, Observer {
        if(it == null) return@Observer

        topHeadlineAdapter.submitList(it)

    })

my Adapter:

class TopHeadlineAdapter:ListAdapter

and finally my diffutilCallback class :

class TopHeadlineDiffCallback :DiffUtil.ItemCallback<Article>(){
    override fun areItemsTheSame(oldItem: Article, newItem: Article): Boolean {
        return oldItem.id == newItem.id
    }

    override fun areContentsTheSame(oldItem: Article, newItem: Article): Boolean {
        return oldItem == newItem
    }

}