Figured it out - the problem is in this little piece of code in your popup screen:
}
protected boolean keyDown(int keycode, int time) {
if(keycode == 1769472){
close();
}
return true;
See that "return true" there? It indicates that the screen has consumed the event, thus the field never gets a chance of getting it. A proper way would be to return true inside the if, right after close(), and return super.keyDown(keycode, time) otherwise. Returning false would also work here, but returning super.... is a cleaner way.
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