[Bug] Grid height is not correctly computed on 4.8.0.1687

[usausa]

Description

I have a layout with grids and labels.
When I updated to the new version of Xamarin.Forms(4.8.0.1687), the layout is now broken.
Also, in the new version the layout varies depending on the value of the label.

Steps to Reproduce

1. See xaml below

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="LayoutSample.MainPage">

    <Grid HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">

        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <Grid Grid.Row="0"
              Background="Red">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="2*" />
            </Grid.ColumnDefinitions>

            <Label Grid.Column="0"
                   Text="Type"
                   FontSize="Large"
                   HorizontalOptions="Start"
                   VerticalOptions="Center" />
            <Label Grid.Column="1"
                   Text="123"
                   Background="White"
                   FontSize="Large"
                   VerticalOptions="Center" />
            <Label Grid.Column="2"
                   Text="No"
                   FontSize="Large"
                   HorizontalOptions="Start"
                   VerticalOptions="Center" />
            <Label Grid.Column="3"
                   Text="999-999"
                   Background="White"
                   FontSize="Large"
                   VerticalOptions="Center" />
        </Grid>

        <BoxView Grid.Row="1"
                 Background="Blue" />

    </Grid>

</ContentPage>

Expected Behavior

See a screenshot of 4.8.0.1560.

Actual Behavior

See a screenshot of 4.8.0.1687.

Basic Information

Version with issue: 4.8.0.1687
Last known good version: 4.8.0.1560
Platform : Android

Screenshots

• 4.8.0.1560

• 4.8.0.1687

• 4.8.0.1687 (Label.Text is empty)

[jsuarezruiz]

Attached repro sample: Issue12900.zip

[Transis-Felipe]

Same issue for me

[MagicAndre1981]

I also see this in Android and UWP

[nZeus]

Hi. We cannot upgrade Xamarin.Forms from 4.6.0.726 to 4.8.0.1687 because we also have the same issue. Height="70*" doesn't work anymore.
4.6.0.726:

4.8.0.1687: