FAB is not animated when one Snackbar line is deleted

Question

I have a CoordinatorLayoutsupport FloatingActionButtonin which I want to display Snackbar..

<android.support.design.widget.CoordinatorLayout
    android:id="@+id/rootView"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        ...
    </RelativeLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab_add_field"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:layout_margin="@dimen/margin_default"
        android:layout_marginBottom="@dimen/profile_floating_margin_bottom"
        android:layout_marginRight="@dimen/profile_floating_margin_right"
        android:clickable="true"
        android:src="@drawable/icon_plus"
        app:backgroundTint="@color/brand_green"
        app:borderWidth="0dp"
        app:elevation="@dimen/fac_icon_elevation"/>
</android.support.design.widget.CoordinatorLayout>

Now i'm showing a snackbar like this

Snackbar.make(mRootView, "Something went wrong", Snackbar.LENGHT_SHORT)
        .show();

When it is displayed, FAB slides, when it (after LENGHT_SHORT) disappears, FAB slides down, everything works fine.

However, if I scroll through the Snackbar, the FAB moves down without animating the slides . It just blinks to its original position.

Interestingly, if Snackbar has two lines (regardless of whether it has an action or not) and is unscrewed, FAB revives its place with the usual slide animation .

Is this a mistake in android.support.design.widget.CoordinatorLayout or android.support.design.widget.FloatingActionButton? Any workaround for this?