Not sure if this is an AppGameKit bug or a tablet bug...
When I invoke StartTextInput on my Asus 7" tablet, I am unable to enter a number unless it is preceded by either a letter or another number. So I cannot enter the strings `123` or even `a123.123` but `a123` or `a123b123` are fine. When the app runs on Windows 10, the text box is fine and I can type any sequence of characters in any order. If it is a tablet bug, this is the only instance in using my tablet where I have experienced any odd behavior when trying to enter text.
Goo Goo G\'Joob!