Soft keayboard does not appears on iOS and Android on textInput with renderMode = Direct

I want to use Direct render mode in my flex application but I have some problems with the keyboard. ('pan' mode)

If you try the project I have attached, you will find a spark view with two Spark TextInput:

• One with the spark.skins.mobile.TextInputSkin
• One with no skin, so the default skin

Result on android:

• TextInput Skin : the keyboard appears, but the textInput is hidden
• default skin : perfect, keyboard appears, and textinput is above the keyboard
  Result on iOS:
• TextInputSkin and default skin: keyboard appears but the textinput is hidden