TextInput().do_cursor_movement() doesn't work

[theholzcode]

Software Versions

• Python: 3.6.9
• OS: Linux Mint 19.3 Tricia
• Kivy: 1.11.1
• Kivy installation method: Compiled From Source

I was working in a DataRegister software and needed to create an interactive "date input", basically it would be a textinput that auto-complete your text with bars ('/') while you type. Include the bars was really easy, i didn't know yet how to use insert_text() so i tried to do textinput.text += '/' and then textinput.do_cursor_movement('cursor_right') (already tried with 'cursor_end' and with control=True) and then print(cursor). The bar was put after the text but the cursor didn't change it's position (remaining before the bar).
OBS: i even tried to bruteforce cursor's position by self._cursor = (self.cursor[0]+1, self.cursor[1]) and print(cursor). Print showed that, this time, the cursor changed, but in the app window it doesn't, remaining before the bar.