BottomNavigationView with more than 3 Items: tab title is hiding

I have implemented BottomNavigationView with Android Support Design Library 25. But when I switched the tabs, the title of other tabs are hiding. But there is no such issue in the actual Bottom Navigation View.

Any idea about the cause of the issue? What am I missing?

Here is my code:

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.yunus.ototakip.MainActivity">

<FrameLayout
    android:id="@+id/main_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_above="@+id/bottom_navigation"
    android:layout_alignParentTop="true">
</FrameLayout>

<android.support.design.widget.BottomNavigationView
    android:id="@+id/bottom_navigation"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    app:itemBackground="@color/colorPrimary"
    app:itemIconTint="@color/beyaz"
    app:itemTextColor="@color/beyaz"
    app:menu="@menu/bottombar_menu" />

bottom_bar_menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
 <item
android:id="@+id/bb_menu_arac"
android:enabled="true"
android:icon="@drawable/icon_car"
android:title="@string/araclarim"
app:showAsAction="ifRoom" />
 <item
android:id="@+id/bb_menu_yakin"
android:enabled="true"
android:icon="@drawable/icon_yer"
android:title="@string/yakinimdakiler"
app:showAsAction="ifRoom" />
  <item
android:id="@+id/bb_menu_yaklasan"
android:enabled="true"
android:icon="@drawable/icon_takvim"
android:title="@string/yaklasanlar"
app:showAsAction="ifRoom" />

<item
    android:id="@+id/bb_menu_ipucu"
    android:enabled="true"
    android:icon="@drawable/icon_ipucu"
    android:title="@string/ipuclari"
    app:showAsAction="ifRoom" />
 </menu>

The solution using reflection doesn't work anymore because the field mShiftingMode was removed.

There's an easy way to do it now: Use Support Library 28 or higher and just add app:labelVisibilityMode="labeled" to your BottomNavigationView XML declaration.