I used a sample from MacOs bundle - FXML-LoginDemo.
I noticed that in FXML TextField, the text is only typed when user releases the button (while in all other applications it is typed immediately).
It leads to funny things, especially when combined with modifiers - for example, when I type a capitalized word - "Animal" - I first press Shift, when "A", then release Shift key before I release "A", which leads the word being typed in lower-case.