JavaFX virtual keyboard causing focus loss

Question

Hi I am creating application for raspberry pi and touch display. I have simple application with text area. When i click inside the virtual keyboard correctly shows, but when I try to write on it, it causes focus loss on the text area and the keyboard hides. I am using these JVM options

-Dcom.sun.javafx.isEmbedded=true 
-Dcom.sun.javafx.touch=true 
-Dcom.sun.javafx.virtualKeyboard=javafx 
-Dcom.sun.javafx.vk.adjustwindow=true

The app is running in xserver withut any desktop environment.