Drawer with CollectionView doesn't allow the items in the end to be shown (locking the drawer on 0.9)

[npehrsson]

Using the drawer with a collection, locking the LockStates = new[] { 0.9d };
Seems like the view is spanning 100% of the view, but I can't reach the last items in the list.

    <bottomDrawer:BottomDrawer
                Padding="0"
                BackgroundColor="White"
                ExpandedPercentage="0.9"
                LockStates="{Binding LockStates}"
                IsExpanded="{Binding IsConnectorSelectionViewEnabled}"
                IsVisible="{Binding IsConnectorSelectionViewEnabled}"
         
                RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent,
                                                                       Property=Height,
                                                                       Factor=1,
                                                                       Constant=0}"
                RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent,
                                                                      Property=Width,
                                                                      Factor=1,
                                                                      Constant=0}"
                RelativeLayout.YConstraint="{ConstraintExpression Type=RelativeToParent,
                                                                  Property=Height,
                                                                  Factor=1,
                                                                  Constant=-65}">

                <StackLayout Spacing="0">
                    <BoxView
                        Margin="20,16,20,-5"
                        BackgroundColor="Gray"
                        CornerRadius="2"
                        HeightRequest="3"
                        HorizontalOptions="Center"
                        WidthRequest="80" />
                    <Label
                        Margin="16"
                        FontAttributes="Bold"
                        FontSize="18"
                        Text="{Binding Title}"
                        TextColor="#003154" />
                    <ScrollView>
                         <CollectionView
                    ItemsSource="{Binding Items}"
                    SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
                    SelectionMode="Single"
                    SelectionChangedCommand="{Binding SelectionChangedCommand}">
                <CollectionView.ItemTemplate>
                        <DataTemplate>
                            <Grid Padding="10">
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="Auto" />
                                    <RowDefinition Height="Auto" />
                                </Grid.RowDefinitions>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="Auto" />
                                    <ColumnDefinition Width="Auto" />
                                </Grid.ColumnDefinitions>
                                <Label Grid.Column="1"
                                 Text="{Binding PhysicalReference}"
                                 FontAttributes="Bold" />
                            </Grid>
                        </DataTemplate>
                    </CollectionView.ItemTemplate>
                </CollectionView>
                    </ScrollView>
                </StackLayout>
            </bottomDrawer:BottomDrawer>