inputfield.caretposition in Android not working

Im trying to use the Inputfield.caretposition. On windows it works like a charm but on Android the value it always return the length of the String in the text component. I think its because of the keyboard on Android but i cant find a workaround to this problem.

I need to be able to add to the inputfield some items by clicking them. these items should be added in the last caret position.