onBindViewHolder вызывается еще раз

Question

Я использую эту библиотеку для stickyHeader для recyclerview, и я хочу запустить Filter в теме. проблема в onBindItemViewHolder называется еще раз, и это делает throwIndexOutOfBoundsException, где моя ошибка?

это мой адаптер:

public class RowsAdapter extends StickyHeaderGridAdapter implements Filterable {

private List<RowHeaderJavaModel> headers;
private LinkedHashMap<RowHeaderJavaModel , List<RowItemJavaModel>> mainList , filterList;
private ContentFragmentVM.CustomFilter filter;

public RowsAdapter(ContentFragmentVM viewmodel) {
    filter = viewmodel.new CustomFilter(this);
    this.mainList = new LinkedHashMap<>();
}

@Override
public HeaderViewHolder onCreateHeaderViewHolder(ViewGroup parent, int headerType) {
    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    RowHeaderItemBinding binding = DataBindingUtil.inflate(inflater, R.layout.row_header_item, parent, false);
    return new MyHeaderViewHolder(binding);
}

@Override
public ItemViewHolder onCreateItemViewHolder(ViewGroup parent, int itemType) {
    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    RowItemBinding binding = DataBindingUtil.inflate(inflater, R.layout.row_item, parent, false);
    return new MyItemViewHolder(binding);
}

@Override
public void onBindHeaderViewHolder(HeaderViewHolder viewHolder, int section) {
    ((MyHeaderViewHolder)viewHolder).setHeaderModel(this.headers.get(section));
}

@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onBindItemViewHolder(ItemViewHolder viewHolder, int section, int offset) {
    Log.e("faeze bind",getSectionCount()+"  "+section+"   offset  "+getSectionItemCount(section)+"  "+offset);
    ((MyItemViewHolder)viewHolder).setItemModel(Objects.requireNonNull(filterList.get(this.headers.get(section))).get(offset));
}

public void setLists(List<RowItemJavaModel> unSectionedItems , List<RowHeaderJavaModel> headers )
{
    this.filterList = new LinkedHashMap<>();
    List<RowItemJavaModel> sectionedItems = new ArrayList<>();
    this.headers = new ArrayList<>();
    this.headers.addAll(headers);
    unSectionedItems.get(0).setChapterChanged(true);
    unSectionedItems.get(0).setSessionChanged(true);
    sectionedItems.add(unSectionedItems.get(0));
    for(int i=1 ; i<unSectionedItems.size() ; i++)
    {
       unSectionedItems.get(i).setChapterChanged(!unSectionedItems.get(i).getChapter().equals(unSectionedItems.get(i - 1).getChapter()));
       unSectionedItems.get(i).setSessionChanged(unSectionedItems.get(i).getSessionNo()!= unSectionedItems.get(i - 1).getSessionNo());
       sectionedItems.add(unSectionedItems.get(i));
       if(unSectionedItems.get(i).isSessionChanged())
       {
           RowItemJavaModel temp = unSectionedItems.get(i);
           sectionedItems.remove(sectionedItems.size()-1);
           mainList.put(headers.get(unSectionedItems.get(i-1).getSessionNo()-1),sectionedItems);
           sectionedItems = new ArrayList<>();
           sectionedItems.add(temp);
       }
    }
    mainList.put(headers.get(unSectionedItems.get(unSectionedItems.size()-1).getSessionNo()-1),sectionedItems);
    filterList.putAll(mainList);
    this.notifyDataSetChanged();

}

public void setFilterList(List<RowHeaderJavaModel> headers)
{
    this.headers = new ArrayList<>();
    this.headers.addAll(headers);
    filterList = new LinkedHashMap<>();
    for(int i=0 ; i<this.headers.size() ; i++)
    {
        filterList.put(this.headers.get(i),mainList.get(this.headers.get(i)));
    }
    this.notifyDataSetChanged();
}

@Override
public int getSectionCount() {
    return headers.size();
}

@Override
public int getSectionItemCount(int section) {
    return filterList.get(this.headers.get(section)).size();
}

@Override
public Filter getFilter() {
    return filter;
}

public static class MyHeaderViewHolder extends HeaderViewHolder {
    RowHeaderItemBinding headerBinding;

    MyHeaderViewHolder(RowHeaderItemBinding binding)
    {
        super(binding.getRoot());
        headerBinding = binding;
    }
    void setHeaderModel(RowHeaderJavaModel model)
    {
        headerBinding.setModel(model);
    }
}

public static class MyItemViewHolder extends ItemViewHolder {
    RowItemBinding itemBinding;

    MyItemViewHolder(RowItemBinding binding)
    {
        super(binding.getRoot());
        itemBinding = binding;
    }

    void setItemModel(RowItemJavaModel model)
    {
        itemBinding.setModel(model);
    }

}

}

и это мой фильтр:

public class CustomFilter extends Filter
{
    RowsAdapter adapter;
    final FilterResults results = new FilterResults();
    boolean isPageFilter;

    public CustomFilter(RowsAdapter adapter) {
        this.adapter = adapter;
    }

    public void setPageFilter(boolean pageFilter) {
        isPageFilter = pageFilter;
    }

    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        filterItems.clear();
        filterHeader.clear();

        if (constraint.length() == 0)
        {
            if(isPageFilter)
                filterItems.addAll(items);
            else
                filterHeader.addAll(headers);
        }
        else
        {
            final String filterPattern = constraint.toString().toLowerCase().trim();
            if(isPageFilter)
                    for (int i=0 ; i<items.size() ; i++) {
                    if (items.get(i).getPage().contains(filterPattern)) {
                        filterItems.add(items.get(i));
                    }
                }
            else
                for (int i=0 ; i<headers.size() ; i++) {
                    if (headers.get(i).getSessionNumberString().contains(filterPattern)) {
                        filterHeader.add(headers.get(i));
                    }
                }
        }
        if(isPageFilter)
        {
            results.values = filterItems;
            results.count = filterItems.size();
        }
        else
        {
            results.values = filterHeader;
            results.count = filterHeader.size();
        }

        return results;
    }

    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        if(isPageFilter)
            this.adapter.setLists(filterItems,headers);
        else
            this.adapter.setFilterList((List<RowHeaderJavaModel>) results.values);

    }
}