TouchScreenKeyboard not working with GUI.TextArea (tested with Android tablet)

I am trying to make a Gui.TextArea to receive the input from my Android tablet. I need the user to be able to edit the text from the textarea.

void Start () { TouchScreenKeyboard.hideInput = true;

         keyboard = new TouchScreenKeyboard("", TouchScreenKeyboardType.NumberPad, false, true, false, false, "");
         keyboard.active = false;
 }
 
 void OnGUI(){
 if (GUI.Button(new Rect(0, 280, 150, 40), "Show kyeboard")){
 keyboard.active = true;
 TouchScreenKeyboard.Open(keyboard.text, TouchScreenKeyboardType.NumberPad, true, false);
   }
 
 if (GUI.Button(new Rect(200, 280, 150, 40), "Hide kyeboard")){
 keyboard.active = false;
 } 
 // I create a box and the textarea
   Rect texareaLocation = new Rect(10, 10, 200, 200);
   Rect boxLocation = new Rect(texareaLocation.x - 2, texareaLocation.y - 2, texareaLocation.width + 4, texareaLocation.height + 4);
   GUI.Box(boxLocation, "");
 
    keyboard.text= GUI.TextArea(texareaLocation, keyboard.text, fontStyle);
 }

This code is working on my PC (I can write, edit, select text into the textArea) When I deploy on my Android tablet the following are happening: I can write and delete text only from the end of the string (I cannot move the cursor - at the beginning or before a word I entered ... ) I cannot select the text from the textArea

For example if I am trying to move focus on other control after a certain text is entered I cannot do that on Android. like this:

 if (keyboard.text != null && keyboard.text.Length >= 1)
         {
             GUI.FocusControl("textarea2");  // the focus is not changing
         } 

Also the Event.current.keyCode is not detected when typing from Touch Screen Keyboard

Can you please help? What I am doing wrong? I don't understand how this touch TouchScreenKeyboard is working when: TouchScreenKeyboard.hideInput = true;