Calling refresh() method twice, stops the pagination.

I'm able to populate the list and pagination is working as expected. But when I call adapter.refresh() method twice by using pull to refresh, the pagination stops working.

Please refer the below video to get the better idea about the prolem.
https://www.dropbox.com/s/0k2g9mlktv5gee6/22-05-22-10-26-37.mp4?dl=0

**VideoPagingSource.kt**
```
class VideoPagingSource(
private val apiInterface: ApiInterface,
private val schoolId: String,
private val ordering: String?,
private val courseId: String?,
private val moduleId: String?,
private val searchText: String?
) : PagingSource() {

override fun getRefreshKey(state: PagingState): Int? = null

override suspend fun load(params: LoadParams): LoadResult {
val pageNumber = params.key
return try {
val response = apiInterface.getVideos(schoolId, ordering, courseId, moduleId, searchText, pageNumber)
val pagedResponse = response?.body()
var nextPageNumber: Int? = null
if (pagedResponse?.links?.next != null) {
val uri = Uri.parse(pagedResponse.links.next)
val nextPageQuery = uri.getQueryParameter("page")
nextPageNumber = nextPageQuery?.toInt()
}

LoadResult.Page(
data = response?.body()?.objects.orEmpty(),
prevKey = null,
nextKey = nextPageNumber
)
} catch (e: Exception) {
LoadResult.Error(e)
}
}

}
```
**PreClassViewModel.kt**

```
class PreClassViewModel @Inject constructor(private val repository: PreClassRepository) :
ViewModel() {

private val queryParamLiveData = MutableLiveData()

val videosLiveData = queryParamLiveData.switchMap {

repository.getVideos(
schoolId = it.extraArgs[0],
ordering = it.extraArgs[1],
courseId = it.courseId,
moduleId = it.chapterId,
searchText = it.searchText
).cachedIn(viewModelScope)

}

fun setQueryParam(queryParams: QueryParams){
queryParamLiveData.value = queryParams
}

}
```
**VideosFragment.kt**
```
class VideosFragment : BaseFragment(FragmentVideosBinding::inflate),
VideosPagingAdapter.VideoClickListener {

private val viewModel by viewModels()
private var chapter: ModulesItem? = null
private var courseId: String? = null
private var adapter: VideosPagingAdapter? = null

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)

chapter = Gson().fromJson(arguments?.getString(BUNDLE_CHAPTER), ModulesItem::class.java)
courseId = arguments?.getString(BUNDLE_COURSE_ID)

viewModel.setQueryParam(
QueryParams(
courseId = courseId,
chapterId = chapter?.id.toString(),
searchText = null,
me?.academicProfile?.school?.id?.toString()!!,
"sequence",
)
)

}

override fun initView() {
getMainActivity().showBothNavigation()
getMainActivity().showBackButton()

adapter = VideosPagingAdapter(chapter?.imageUrl, this)
binding.videoRV.adapter = adapter!!.withLoadStateFooter(footer = DefaultFooterAdapter())
lifecycleScope.launch {
adapter?.loadStateFlow?.collectLatest {

binding.progressBar.isVisible = it.refresh is LoadState.Loading

if (binding.swipeContainer.isRefreshing){
binding.swipeContainer.isRefreshing = it.refresh is LoadState.Loading
}

}
}

}

override fun initListener() {
binding.swipeContainer.setOnRefreshListener {
adapter?.refresh()
}
}

override fun addObserver() {

viewModel.videosLiveData.observe(viewLifecycleOwner) {
adapter?.submitData(viewLifecycleOwner.lifecycle, it)

}

}

override var setSelection: String
get() = Constants.FEATURE_LEARN
set(value) {}

override fun onVideoClick(video: Video) {

}

}
```

Start by reproducing the double-refresh behavior in VideosFragment using the provided pull-to-refresh flow, then trace adapter.refresh(), submitData(), and loadStateFlow alongside VideoPagingSource.kt and PreClassViewModel.kt. Done means pagination continues working after refresh() is called twice and the refresh state still clears correctly.

Written by the indexing model from the issue text.