WPF TextBlock inside a Scrollviewer cuts off some text

Question

So I have this problem, a textblock's text gets cut off, even though you can still scroll with scrollviewer to the end.

You can see the scrollviewer is still able to scroll to where the text should be.

Heres the XAML:

<Grid>
    <ScrollViewer Height="Auto" VerticalScrollBarVisibility="Auto" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch" >
        <TextBlock x:Name="text" Padding="5" Margin="0" TextWrapping="Wrap" Text="" FontSize="24" TextTrimming="WordEllipsis" VerticalAlignment="Bottom" />
    </ScrollViewer>
</Grid>

EDIT the whole pivot control code:

<controls:Pivot x:Name="pivot" Margin="0" Grid.Row="1" Title="title" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
        <controls:PivotItem Header="Straipsnis">
            <Grid>
                <ScrollViewer Height="Auto" VerticalScrollBarVisibility="Auto" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch" >
                    <Border BorderBrush="White" BorderThickness="1">
                        <TextBlock x:Name="text" Padding="5" TextWrapping="Wrap" Text="" FontSize="24"/>
                    </Border>
                </ScrollViewer>
            </Grid>
        </controls:PivotItem>
        <controls:PivotItem Header="Komentarai">
            <Grid>
                <ListBox x:Name="commentsListBox" ItemTemplate="{StaticResource CommentsList}" Height="Auto" Width="Auto" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch" HorizontalAlignment="Stretch" FontSize="20"/>
                <TextBlock x:Name="errorText" TextWrapping="Wrap" Text="Nėra komentarų..." FontSize="36" HorizontalAlignment="Left" Margin="10,0,0,0"/>
            </Grid>
        </controls:PivotItem>
    </controls:Pivot>

Answer 1

Well, turns out the TextBlock has limits, 2048x2048 or something like that, after which the text just gets cut off. So, I found this custom text control that bypasses this limitation :) Maybe someone will find it useful, I did.

Creating Scrollable TextBlock for WP7.

Download link