Android EditText copy/paste menu issue

Question

I noticed on one of the application screens that when you select the word in EditText there is no context menu for copying/pasting the text. Moreover, a long-click on the empty input field works properly.

This issue is noticeable only in one context in this Activity. My attempts to follow the advice by adding to the element android:textIsSelectable="true" led to nothing. Maybe anyone else faced this problem?

Here is my EditText code:

<EditText
        android:id="@+id/etMessage"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginBottom="10dp"
        android:layout_toStartOf="@id/btnSend"
        android:layout_toLeftOf="@id/btnSend"
        android:layout_toEndOf="@id/btnStickers"
        android:layout_toRightOf="@id/btnStickers"
        android:background="@drawable/edittext_background_white_border_corners"
        android:hint="@string/type_message"
        android:maxLines="5"
        android:padding="10dp"
        android:textColorHighlight="@color/colorPrimary"
        android:textIsSelectable="true"
        android:textSize="16sp" />