Contextual action bar not overlapping toolbar completely

I'm adding contextual action bar after long click of RecyclerView element. Problem is toolbar is still visible. Contextual action bar doesn't overlap completely.

Tried searching for info, but no or very little info found.

My toolbar:

After adding contextual action bar:

As you can see toolbar is still visible at the bottom.

Theme im using:

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <item name="windowNoTitle">true</item>
    <item name="windowActionBar">false</item>
    <item name="windowActionModeOverlay">true</item>
</style>

My toolbar:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/toolbar"
    android:minHeight="?android:attr/actionBarSize"
    android:background="#F7F8F9"
    app:titleTextColor="@color/colorPrimaryDark" />

cab.xml

<?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_upload"
        android:title="Upload" 
        android:icon="@drawable/ic_file_upload_black_24dp" 
        app:showAsAction="always" />

    <item 
        android:id="@+id/action_reboot" 
        android:title="Reboot" 
        android:icon="@drawable/ic_refresh_black_24dp" 
        app:showAsAction="always"/>
</menu>

This is how i'm starting Contextual action bar:

startSupportActionMode(new android.support.v7.view.ActionMode.Callback() {
    @Override
    public boolean onCreateActionMode(android.support.v7.view.ActionMode mode, Menu menu) {
        mode.getMenuInflater().inflate(R.menu.cab, menu);
        return true;
    }

    @Override
    public boolean onPrepareActionMode(android.support.v7.view.ActionMode mode, Menu menu) {
        return false;
    }

    @Override
    public boolean onActionItemClicked(android.support.v7.view.ActionMode mode, MenuItem item) {
        return false;
    }

    @Override
    public void onDestroyActionMode(android.support.v7.view.ActionMode mode) {

    }
});

My readings:

contextual action bar padding in Android

Contextual action bar does not overlay my toolbar

Tried pretty much everything from questions above. None of them have helped.

P.S. Tried increasing/decreasing size of the toolbar, but visible line is still visible

So how to make Contextual action bar overlap toolbar completely?

Add

<item name="actionModeBackground">your_color</item>

in your styles.xml file, it will overlay your toolbar completely.