ComboBox does not change BorderThickness in IsMouseOver and IsPressed

I'm trying to change the size of my ComboBox border in the TextBox, I just set a BorderThickness value and it will be applied in the normal TextBox, IsMouseOver and IsPressed in the TextBox.

In the ComboBox this does not apply, when defining a BorderThickness it only applies only in the normal ComboBox, IsMouseOver and IsPressed are of the standard size.

Example:

<ComboBox Name="MyCombTest" Style="{StaticResource MaterialDesignOutlinedComboBox}" BorderThickness="1"/>

从 MaterialDesignOutlinedComboBox 样式入手，检查 BorderThickness 在 normal、IsMouseOver 和 IsPressed 状态下是如何应用的。完成的标准是，在 ComboBox 上设置的 BorderThickness 在这三个状态下都能得到一致的遵循。