Currently, when creating a ComboBox Template, its ItemsPanel is exposed and displays, however it appears to operate on its own plane of scaling and zoom, making it incredibly to wrangle and maintain control over.

Video attached.

Repro Steps:

1) Create a Studio Project containing a MainPage.xaml

2) Introduce a ComboBox to the Page, and set its Alignment to Vertical Centre| Horizontal Centre

3) Zoom in really close to the ComboBox so that it fills the viewport (~1500% Zoom)

3) Right-Click on the ComboBox, and from the ContextMenu, navigate to 'Templates'-->'ComboBox'-->'Create'.
This will open the ComboBox Template in the Template Dummy Editor.

Observe how the ComboBox ItemsPanel opens during this process.

4) Zoom in and out of the Stage.

Observe how zooming in and out has no effect on the presentation of the ItemsPanel.
Observe how until the Template is exited, the ItemsPanel continues taking up the entire screen space.

Expected Results: The ComboBox ItemsPanel scales/zooms along with the rest of the ComboBox and the rest of the Stage.