Incorrect word wrap in labels/pickers - xamarin

Question

Sometimes my text in labels or pickers in Android will wrap before the end of a label. It doesn't happen every time, but when it happens the text will initially appear correctly and then quickly rerender incorrectly. This only happens when the views are in a Grid, but I can't be sure that's the cause. Using the "show layout boundaries" option, I can see that the width of the label is correct and doesn't change, it's just the word wrap that doesn't properly.
relevant code in a ContentView subclass constructor:
Grid _contentGrid = new Grid()
{
RowDefinitions = new RowDefinitionCollection()
{
new RowDefinition() { Height = new GridLength(1, GridUnitType.Auto) },
new RowDefinition() { Height = new GridLength(1, GridUnitType.Auto) },
new RowDefinition() { Height = new GridLength(1, GridUnitType.Auto) },
new RowDefinition() { Height = new GridLength(1, GridUnitType.Auto) },
},
ColumnDefinitions = new ColumnDefinitionCollection()
{
new ColumnDefinition() { Width = 48 },
new ColumnDefinition() { Width = new GridLength(1, GridUnitType.Star) },
},
BackgroundColor = Color.Transparent,
Padding = new Thickness(16, 16, 16, 16),
ColumnSpacing = 16,
RowSpacing = 8,
HorizontalOptions = LayoutOptions.FillAndExpand
};
Label _questionLabel = new Label()
{
Text = "Do you want to update the instrument setup?",
TextColor = Color.FromHex(Colours.TextGrey),
HorizontalOptions = LayoutOptions.FillAndExpand,
XAlign = TextAlignment.Start,
WidthRequest = 344
};
_contentGrid.Children.Add(_questionLabel, 0, 2, 3, 4);
DialogView dialogView = new DialogView()
{
TopView = TitleLabel,
MiddleView = _contentGrid,
BottomView = ButtonGrid,
TopColour = Color.FromHex(Colours.Blue),
MiddleColour = Color.White,
BottomColour = Color.White,
MiddleHeight = 150,
};
Grid Holder = new Grid()
{
ColumnDefinitions = new ColumnDefinitionCollection()
{
new ColumnDefinition() { Width = new GridLength(1, GridUnitType.Star) },
new ColumnDefinition() { Width = 368 },
new ColumnDefinition() { Width = new GridLength(1, GridUnitType.Star) },
},
RowDefinitions = new RowDefinitionCollection()
{
new RowDefinition() { Height = new GridLength(1, GridUnitType.Star) },
new RowDefinition() { Height = new GridLength(1, GridUnitType.Auto) },
new RowDefinition() { Height = new GridLength(1, GridUnitType.Star) },
},
BackgroundColor = Color.FromHex("b0000000")
};
Holder.Children.Add(dialogView, 1, 1);
this.Content = Holder;
The _questionLabel text only shows "Do you want"