Program: 39073
Project: 39073
Buggy source:
@Nullable @Override public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,@Nullable Bundle savedInstanceState){
  View view=inflater.inflate(R.layout.home_fragment,null);
  noNetImage=view.findViewById(R.id.noNet);
  wallpapersModelArrayList=new ArrayList<>();
  handler=new Handler();
  initData();
  gridLayoutManager=new GridLayoutManager(getContext(),2);
  recyclerView=view.findViewById(R.id.homeFragment_rv);
  recyclerView.setHasFixedSize(true);
  recyclerView.setLayoutManager(gridLayoutManager);
  homeFragmentCustomAdapter=new HomeFragmentCustomAdapter(wallpapersModelArrayList,getContext(),recyclerView);
  homeFragmentCustomAdapter.setOnLoadMoreListener(new onLoadMoreListener(){
    @Override public void onLoadMore(){
      wallpapersModelArrayList.add(null);
      Log.i("String_Node_Str","String_Node_Str");
      homeFragmentCustomAdapter.notifyItemInserted(wallpapersModelArrayList.size() - 1);
      handler.postDelayed(new Runnable(){
        @Override public void run(){
          wallpapersModelArrayList.remove(wallpapersModelArrayList.size() - 1);
          homeFragmentCustomAdapter.notifyItemRemoved(wallpapersModelArrayList.size());
          Log.i("String_Node_Str","String_Node_Str");
          Log.i("String_Node_Str","String_Node_Str");
          new loadMore().execute("String_Node_Str" + pageCount);
          homeFragmentCustomAdapter.setLoaded();
          Log.i("String_Node_Str","String_Node_Str");
        }
      }
,700);
    }
  }
);
  recyclerView.setAdapter(homeFragmentCustomAdapter);
  recyclerView.addItemDecoration(new RecyclerItemDecoration(2));
  setHasOptionsMenu(true);
  return view;
}

Fixed version (ground truth):
@Nullable @Override public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,@Nullable Bundle savedInstanceState){
  View view=inflater.inflate(R.layout.home_fragment,null);
  noNetImage=view.findViewById(R.id.noNet);
  noNetText=view.findViewById(R.id.noNetText);
  connectBtn=view.findViewById(R.id.connectBtn);
  connectBtn.setOnClickListener(new View.OnClickListener(){
    @Override public void onClick(    View view){
      startActivityForResult(new Intent(Settings.ACTION_WIFI_SETTINGS),0);
    }
  }
);
  wallpapersModelArrayList=new ArrayList<>();
  handler=new Handler();
  initData();
  gridLayoutManager=new GridLayoutManager(getContext(),2);
  recyclerView=view.findViewById(R.id.homeFragment_rv);
  recyclerView.setHasFixedSize(true);
  recyclerView.setLayoutManager(gridLayoutManager);
  homeFragmentCustomAdapter=new HomeFragmentCustomAdapter(wallpapersModelArrayList,getContext(),recyclerView);
  homeFragmentCustomAdapter.setOnLoadMoreListener(new onLoadMoreListener(){
    @Override public void onLoadMore(){
      wallpapersModelArrayList.add(null);
      Log.i("String_Node_Str","String_Node_Str");
      homeFragmentCustomAdapter.notifyItemInserted(wallpapersModelArrayList.size() - 1);
      handler.postDelayed(new Runnable(){
        @Override public void run(){
          wallpapersModelArrayList.remove(wallpapersModelArrayList.size() - 1);
          homeFragmentCustomAdapter.notifyItemRemoved(wallpapersModelArrayList.size());
          Log.i("String_Node_Str","String_Node_Str");
          Log.i("String_Node_Str","String_Node_Str");
          new loadMore().execute("String_Node_Str" + pageCount);
          homeFragmentCustomAdapter.setLoaded();
          Log.i("String_Node_Str","String_Node_Str");
        }
      }
,900);
    }
  }
);
  recyclerView.setAdapter(homeFragmentCustomAdapter);
  recyclerView.addItemDecoration(new RecyclerItemDecoration(2));
  setHasOptionsMenu(true);
  return view;
}