Currently, when selecting a Property value via the Predictive Text Input method, once the desired value has been hovered in the list, it requires confirming selection twice for it to actually apply and for the result to be visible on-Stage.

This occurs both when using Keyboard only to make a selection, and requires pressing [Enter] twice for the value to apply.
This also happens when using the Mouse, where the first mouse click of the desired value does not apply it on-Stage, and requires either pressing [Enter] after selection, or clicking in an empty area of the Studio interface for the value to apply.

See attached video.

Repro Steps:

1) Create a Studio Project featuring a MainPage.xaml

2) Introduce a Button Element to the Stage, and set a nice and visible custom 'Background' Colour to it.

3) Right-click on the Button, and create a new Template for it, saved anywhere, and with any name.
This will open the Button in the Inline Dummy Template Editor.

4) Select the 'BackgroundBorder' Border Element found by default inside of the Button, and in its Properties, hover over the 'Background' Property, click on its 3-Dot menu, and select 'Create Binding'.

5) In the Binding Selection menu, select the 'Relative' tab, then set the 'Relative Mode' as 'Templated Parent',

6) Click on the 'Path' field where 'NotSet' is currently present, and type the letter 'b'.

7) Use the arrow keys to set focus on the 'Background' Path in this list, then press [Enter] to select it.

Observe how the background colour has not applied on-Stage.

8) Press [Enter] again.

Observe how at the second time of pressing, the color has now applied successfully.

9) Clear the Local Value for the 'Background' Property, and repeat Steps 4) to 7), but this time instead of pressing [Enter, click on the 'Background' Path in the Predictive Text listing.

Observe how similarly to the first press of the [Enter] in Step 7), that the Background color has not applied.

10) Click anywhere in the Studio interface outside of the Background Property Binding menu.

Observe how now, the colour has successfully applied.

Expected Results: Selecting an item from the Predictive Text Helper only requires pressing [Enter] or clicking on it once to apply it as the chosen value.