TextFields Android issue: switching between different fields it copies the string

It's hard to explain. I just wanted to remove the edit box on the top of the keyboard appearing when I focus a TextField, so I put this code in global variables:

 TouchScreenKeyboard.hideInput = true;

It works, but when i type something in a TextField (for example, username), and I simply tap in the second one (password), it copies the first string in the second field! For example: i type STRING in the first TextField; i change the focus on the second one and i'll have STRING also in this field. As if the keyboard input is not saved in the first field.

There is no issue when the code up there isn't written.