Last group expand issue about expandable-recycler-view HOT 8 OPEN

/**
   * @return the number of group and child objects currently expanded
   * @see ExpandableList#getVisibleItemCount()
   */
  @Override
  public int getItemCount() {
    return expandableList.getVisibleItemCount();
  }

`//...
templateFragment.setAdapter(templateGroupList, kinveyClient);
//...

//...
public void setAdapter(List<TemplateGroup> data, Client kinveyClient) {
        progressBar.setVisibility(View.GONE);
        mList.setVisibility(View.VISIBLE);
        final TemplateListAdapter adapter = new TemplateListAdapter(data, this.getActivity(), kinveyClient);
        mLayoutManager = new WrapContentLinearLayoutManager(getContext());
        mList.setAdapter(adapter);
        mList.setLayoutManager(mLayoutManager);
        mList.setHasFixedSize(true);
    }
//...

public class TemplateListAdapter extends ExpandableRecyclerViewAdapter<FormDataCategoryViewHolder, TemplateActionsViewHolder>{
    private List<TemplateGroup> mDataset;
    private Context context;
    private DataStore<KCTemplateBean> templateData;
    private LayoutInflater mInflater;

    // Provide a suitable constructor (depends on the kind of dataset)
    public TemplateListAdapter(List<TemplateGroup> myDataset, Context ctx, Client kinveyClient) {
        super(myDataset);
        if (ctx!=null){

            context = ctx;
            mInflater = LayoutInflater.from(context);
            mDataset = myDataset;
            templateData = DataStore.collection(AppProperties.KINVEY_COLLECTION_TEMPLATES, KCTemplateBean.class, StoreType.SYNC, kinveyClient);
        }
    }

    @Override
    public FormDataCategoryViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType){
        View view = mInflater.inflate(R.layout.list_item_category, parent, false);
        return new FormDataCategoryViewHolder(view);
    }

    @Override
    public TemplateActionsViewHolder onCreateChildViewHolder(ViewGroup parent, int viewType){
        View view = mInflater.inflate(R.layout.template_actions, parent, false);
        return new TemplateActionsViewHolder(view);
    }

    @Override
    public void onBindGroupViewHolder(FormDataCategoryViewHolder holder, int flatPostition, ExpandableGroup group){
        holder.setFormDataCategoryTitle(group);
    }

    @Override
    public void onBindChildViewHolder(TemplateActionsViewHolder holder, int flatPosition, ExpandableGroup group, int childIndex){
        final KCTemplateBean templateBean = (KCTemplateBean) group.getItems().get(childIndex);
        holder.setTemplateActions(context, templateBean, templateData);
    }
    @Override
    public boolean onGroupClick(int flatPosition){

        return super.onGroupClick(flatPosition);
    }
    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return mDataset.size();
    }
}

public class TemplateActionsViewHolder extends ChildViewHolder implements View.OnClickListener {
    private Button previewButton, purchaseButton;
    private KCTemplateBean templateBean;
    private DataStore<KCTemplateBean> templateData;
    private Context mContext;

    public TemplateActionsViewHolder(View itemView){
        super(itemView);
        previewButton = (Button)itemView.findViewById(R.id.previewButton);
        purchaseButton = (Button)itemView.findViewById(R.id.purchaseButton);
    }

    public void setTemplateActions(final Context context, final KCTemplateBean template, final DataStore<KCTemplateBean> templateData){
        this.templateBean = template;
        this.templateData = templateData;
        mContext = context;
        previewButton.setOnClickListener(this);
        purchaseButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v){
        switch (v.getId()){
            case R.id.previewButton:
                //preview
                } catch (Exception e) {
                    e.printStackTrace();
                }
                break;
            case R.id.purchaseButton:
//purchase
                break;
        }
    }
}

public class CustomLinearLayoutManager extends LinearLayoutManager {
    public LinearLayoutManagerWrapper(Context context) {
        super(context);
    }

    public LinearLayoutManagerWrapper(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }
    // java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid view holder adapter positionViewHolder
    @Override
    public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
        try {
            super.onLayoutChildren(recycler, state);
        } catch (IndexOutOfBoundsException e) {

        }
    }
}```

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