Repro Steps:

1) In Windows, switch your Keyboard to United States - International
This can be done by typing "Edit Language and Keyboard Options" in the Start Menu, and clicking on the Start Menu Result wit this name.
Then, in the 'Language' section, in the active 'Language' module, click the 3 little dots on the right. (screenshot attached).
Then, under the 'Keyboards' section, select 'Add a Keyboard', and select 'United States-International' in the list.
Then, ensure this United States-International keyboard is your active Keyboard layout. This can typically be seen in the bottom-of-screen Taskbar (screenshot attached). If ENG INTL is not active, click on the Taskbar shortcut to change it.

2) Verify that the Keyboard is indeed active by opening Notepad and typing the following:
' (Single press of the '/" key + spacebar )
" (Shift+single press of the '/" key + spacebar)
(Single press of the/~ key + spacebar)
~ (Shift+single press of the `/~ key + spacebar)

3) Open any project in Studio, and create a TextBlock.

4) In the 'Text' field, repeat the same keyboard presses to render the 4 characters that successfully rendered in Notepad in Step 2.

Observe how the Studio textfield does not render the characters asked and renders a blank/space character instead.
However, if they are copy-pasted, they render in the field without issue.

Expected Results: All characters typed on a keyboard render inside an Input Field