How to make ScrollView scrollable when windowSoftInputMode is adjustPan?

Question

I use BottomNavigationView in my activity. When keyboard opens and windowSoftInputMode is NOT adjustPan, BottomNavigationView is shown over keyboard. That's why I set windowSoftInputMode as adjustPan. But, now, my ScrollView is not scrollable. When I change windowSoftInputMode to adjustResize, ScrollView is working fine. The following structure is scrollable, when windowSoftInputMode is set to adjustResize, but not scrollable, if adjustPan is set:

   <ScrollView 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">
     <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

     <!-- Other stuff --> 

  </android.support.constraint.ConstraintLayout>
  </ScrollView>

ScrollView is used as root view. So, how to solve this problem?