ListModel.get() and a variable that was assigned ListModel.get() to are not equal

import QtQuick 2.3
import QtTest 1.1

TestCase {
    ListModel {
        id: listModel
        ListElement { foo: "bar" }
    }

    function test_ListModel() {
        var element = listModel.get(0);
        compare(element, listModel.get(0)); // PASS with 5.5.0 and 5.6.0
        verify(element == listModel.get(0)); // PASS with 5.5.0 but FAIL with 5.6.0
        verify(element === listModel.get(0)); // PASS with 5.5.0 but FAIL with 5.6.0
    }
}