A gray dot appeared when "android:layout_width" less than 30.

[iboying]

            android:id="@+id/progressBar"
            app:mlpb_progress_stoke_width="2dp"
            app:mlpb_progress_color="@color/loginFocusedBorder"
            app:mlpb_background_color="@color/white"
            android:layout_width="20dp"
            android:layout_height="20dp"
            android:layout_marginTop="-3dp"
            android:layout_marginRight="-3dp"
            android:visibility="gone"
            android:layout_gravity="right"/>

A gray dot appeared In the upper left corner.

[FitsumKurabachew]

        android:id="@+id/progressBar"
        app:mlpb_progress_stoke_width="2dp"
        app:mlpb_progress_color="@color/loginFocusedBorder"
        app:mlpb_background_color="@color/white"
        android:layout_width="20dp"
        android:layout_height="20dp"
        android:layout_marginTop="-3dp"
        android:layout_marginRight="-3dp"
        android:visibility="gone"
        android:layout_gravity="right"/>

A gray dot appeared In the upper left corner.