Pagination can silently stop being applied in some situations

[boxed]

Repro:

def test_how_do_i_add_sums_to_a_table(really_big_discography):
    # language=rst
    """
    .. table-empty-message:

    How do I add sums to a table?
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    .. uses Table.tbody
    .. uses Column.extra_evaluated

    Sometimes it's useful to annotate your table with more data, like the sum of each of the columns.

    (Bear with me here, I know that sums of years makes no sense :P )
    """

    # @test
    bootstrap5 = bootstrap_docs
    # @end

    my_style = Style(
        bootstrap5,
        Column=dict(
            shortcuts=dict(
                number__extra_evaluated__sum=lambda column, table, **_: sum((getattr(row, column.attr, 0) if column.attr else 0) or 0 for row in table.get_visible_rows()) or None if table.get_visible_rows() is not None and table.extra_evaluated.has_summary else None,
            )
        ),
        Table=dict(
            tbody__children=dict(
                summary=html.div(
                    after=LAST,
                    template=Template('''
                    {% if table.extra_evaluated.has_summary %}
                        <tr class="summary-row">
                        {% for column in table.columns.values %}
                            {% if column.render_column %}
                                <td class="numeric">
                                    {% if column.extra_evaluated.sum %}
                                        {{ column.extra_evaluated.sum }}
                                    {% endif %}
                                </td>
                            {% endif %}
                        {% endfor %}
                    {% endif %}
                    </tr>
                '''))
            ),
            extra_evaluated__has_summary=lambda table, **_: any(column.extra_evaluated.get('sum', None) for column in values(table.columns)),
        ),
    )

    table = Table(
        auto__model=Album,
        iommi_style=my_style,
    )

    # @test
    show_output(table, url='/?order=year')
    assert len(table.bind(request=req('get')).rows) <= DEFAULT_PAGE_SIZE
    # @end

The workaround is to change
number__extra_evaluated__sum=lambda column, table, **_: sum((getattr(row, column.attr, 0) if column.attr else 0) or 0 for row in table.get_visible_rows()) or None if table.get_visible_rows() is not None and table.extra_evaluated.has_summary else None,
to
number__extra_evaluated__sum=lambda column, table, **_: lambda: sum((getattr(row, column.attr, 0) if column.attr else 0) or 0 for row in table.get_visible_rows()) or None if table.get_visible_rows() is not None and table.extra_evaluated.has_summary else None,