Search View with collapseActionView|always does not work on Action Menu

In an AppCompat activity with context action bar

Trying to add android.support.v7.widget.SearchView to the action mode menu the searchView doesn't expand

using appcompat-v7:25.2.0

menu Resource file

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/action_search"
        android:icon="@drawable/ic_search_dark_24dp"
        android:title="@string/search_list"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="always|collapseActionView" />
    <item
        android:id="@+id/item_two"
        android:icon="@drawable/item_two"
        android:title="@string/item_two"
        app:showAsAction="ifRoom"
        >
    </item>
</menu>

Activity Theme

<style name="AppTheme.NoActionBar">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
    <item name="windowActionModeOverlay">false</item>
    <item name="actionModeBackground">@color/colorPrimaryDark</item>
</style>

Activity code

private class SelectionActionModeCallBack implements ActionMode.Callback {
        private SearchView mSearchView;

        SelectionActionModeCallBack() {


        }


        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            mode.getMenuInflater().inflate(R.menu.book_selection_action_menu, menu);//Inflate the menu over action mode


            mSearchView =
                    (SearchView) menu.findItem(R.id.action_search).getActionView();


            mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
                @Override
                public boolean onQueryTextSubmit(String s) {
                    startSearch(s);
                    return true;
                }

                @Override
                public boolean onQueryTextChange(String s) {
                    return false;
                }
            });
            return true;
        }

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            mSearchView.requestFocus();
            return true;
        }

This contradicts the documentation

Contrary to the case when using Search View in action bar the desired collapsible effect for search view while having other items in the action mode use

app:showAsAction="always"

without collapseActionView !