Bug in v2.2.4 ?

[jedie]

I seems to me, that v2.2.3 -> v2.2.4 introduces a bug: Adding a new entry to a existing object will add it not always as a new last entry... Sometimes it will be added as the second one.

I found this bug, because a integration tests failed. It looks like:

#...

response = self.client.post(
    path='/admin/foo/add/',
    data=get_test_form_data(
        title='A Test Entry',
        **{
            'chapters-TOTAL_FORMS': '1',
            'chapters-0-title': 'Chapter One',
            'chapters-0-position': '0',
        },
    ),
)
test_item = Foo.objects.get()
self.assertEqual(test_item.title, 'A Test Entry')

#...

response = self.client.post(
    path=f'/admin/foo/{test_item.pk}/change/',
    data=get_test_form_data(
        title='A Test Entry',
        **{
            'chapters-TOTAL_FORMS': '2',
            'chapters-INITIAL_FORMS': '1',
            'chapters-0-id': str(chapter1.pk),
            'chapters-0-test': str(test_item.pk),
            'chapters-0-title': 'Chapter One',
            'chapters-0-position': '1',
            'chapters-1-test': str(test_item.pk),
            'chapters-1-title': 'Chapter Two',
            'chapters-1-position': '0',
            'chapters-__prefix__-test': str(test_item.pk),
            'chapters-__prefix__-position': '0',
        },
    ),
)

test_item.refresh_from_db()
self.assertEqual(
    list(test_item.chapters.values_list('title', flat=True)), ['Chapter One', 'Chapter Two']
)

#...

With v2.2.3 it's correct: ['Chapter One', 'Chapter Two'] With v2.2.4 it's: ['Chapter Two', 'Chapter One']