Multiline TextBox + Wrap with auto size window will grow textbox instead of line break

[sn4k3]

Not sure if this is a bug or is to work like this, but i have a Window with: CanResize="False" & SizeToContent="WidthAndHeight"

Then i have a textbox and tried two methods:

  <Grid RowDefinitions="Auto,10,Auto" ColumnDefinitions="*" >
    <TextBlock Text="Sentence:"/>

    <TextBox Grid.Row="2"
      Text="{Binding Operation.Sentence}"
      Watermark="Type your sentence here."
      Height="150"
      TextWrapping="Wrap"
      AcceptsReturn="True"
      />
    
  </Grid>

AND

  <StackPanel Spacing="10">
    <TextBlock Text="Sentence:"/>

    <TextBox 
      Text="{Binding Operation.Sentence}"
      Watermark="Type your sentence here."
      Height="150"
      TextWrapping="Wrap"
      AcceptsReturn="True"
      />
    
  </StackPanel>

Width is absent so it will strech to window, but i want to constrain content to control width without knowing the width or having one so it always match window width from all other content.

Is there a way to do this?
I'm thinking about after the window loads, set it to fixed width of current bounds so it will keep the optimal witdh and fix this problem, but there is another solution?