Wpf FlowDocument中的表会截断最右边的列，为什么？

我有一个在FlowDocument中有4列的表。我已经设置了列的宽度，但在FlowDocumentReader中查看时，在页面模式或2页模式下，最右边的列会被截断

<FlowDocument >
<Table BorderBrush="Black" BorderThickness="1">
    <Table.Columns>
        <TableColumn Background="Red" Width="120" />
        <TableColumn Background="Green" Width="180" />
        <TableColumn Background="Blue" Width="140" />
        <TableColumn Background="Yellow" Width="140" />
    </Table.Columns>
    <TableRowGroup>
        <TableRow>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Row Number</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Text</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Another Column</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Yet Another Column</Paragraph>
            </TableCell>
        </TableRow>
        <TableRow>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>1</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph >Lorem Ipsum is simply dummy text of the printing and typesetting industry.</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Hello World</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Where is my text?</Paragraph>
            </TableCell>
        </TableRow>
        <TableRow>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>2</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod ...</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph></Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph></Paragraph>
            </TableCell>
        </TableRow>
        <TableRow>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>3</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph></Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph></Paragraph>
            </TableCell>
        </TableRow>
        <TableRow>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>4</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph></Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph></Paragraph>
            </TableCell>
        </TableRow>
        <TableRow>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>5</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph>Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.</Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph></Paragraph>
            </TableCell>
            <TableCell BorderBrush="Black" BorderThickness="1">
                <Paragraph></Paragraph>
            </TableCell>
        </TableRow>
    </TableRowGroup>
</Table>

行号
正文
另一栏
又一专栏
1.
Lorem Ipsum只是印刷和排版行业的虚拟文本。
你好，世界
我的文本在哪里？
2.
洛雷姆·伊普苏姆·多洛尔·西特（Lorem ipsum Door sit amet）是一位杰出的艺术家，他是一位杰出的艺术家。。。
3.
在全方位存在错误的情况下，我们可以清楚地看到这些错误
4.
两人或两人在一个无教区的房间里互相指责。
5.
两人或两人在一个无教区的房间里互相指责。

滚动模式看起来正常：

在页面模式下，情况就不同了。请注意，第三列的一部分和第四列的所有部分都被截断。为什么截断右边的列而不是在下一页显示它们有用？

---

通过将ColumnWidth设置为与PageWidth相同的值，我可以将FlowDocument显示在一列中。我正在使用FlowDocument打印，结果证明效果非常好。PageWidth和PageHeight属性设置为PrintDialog显示的可打印区域。然后设置ColumnWidth以防止在多个列中打印

<FlowDocument PageWidth="850" PageHeight="1056" ColumnWidth="850" >
...
</FlowDocument>

...

通过将ColumnWidth设置为与PageWidth相同的值，我可以将FlowDocument显示在一列中。我正在使用FlowDocument打印，结果证明效果非常好。PageWidth和PageHeight属性设置为PrintDialog显示的可打印区域。然后设置ColumnWidth以防止在多个列中打印

<FlowDocument PageWidth="850" PageHeight="1056" ColumnWidth="850" >
...
</FlowDocument>

...