AutoCompleteTextBox 控件的文本内容无法双向绑定

[XyliaUp]

Describe the bug

模板内部的 PART_SearchTextBox 文本框没有绑定 Text={TemplateBinding Text}
而是通过TextChanged 事件来通知控件文本发生改变

因此设置控件的 Text属性是无效的

Steps to reproduce the bug

    <hc:AutoCompleteTextBox ItemsSource="{Binding Items}" Text="{Binding SearchText}" />

Expected behavior

No response

Screenshots

No response

NuGet package version

None

IDE

No response

Framework type

No response

Windows version

No response

Additional context

No response