Why XAML crashing while resizing an specific page in UWP?

my app has 4 pages. But when I'm trying to resize a specific page (setting page in my app), XAML is crashing and throwing an unhandled exception -

#if DEBUG && !DISABLE_XAML_GENERATED_BREAK_ON_UNHANDLED_EXCEPTION
            UnhandledException += (sender, e) =>
            {
                if (global::System.Diagnostics.Debugger.IsAttached) global::System.Diagnostics.Debugger.Break();
            };
#endif

I'm facing this problem after I added this into my ComboBox -

<ComboBox.ItemTemplate>
    <DataTemplate x:DataType="data:Depertment">
        <TextBlock Text="{x:Bind Dept}"/>
    </DataTemplate>
</ComboBox.ItemTemplate>

Full ComboBox Code

<ComboBox Header="Select The Dept."
          ItemsSource="{x:Bind deptList}"
          x:Name="deptNameCombo"
          Margin="2"
          SelectionChanged="deptNameCombo_SelectionChanged"
          MinWidth="200">
    <ComboBox.ItemTemplate>
        <DataTemplate x:DataType="data:Depertment">
            <TextBlock Text="{x:Bind Dept}"/>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

But if I resize the app while navigating another page and move back to the setting page nothing happens, but if I want to resize the app again while I'm in the setting page, it crashes usually.

What is causing this? Can anyone help?

Thanks.