Serious device bug! sometimes buttons works badly, and the text within textfield is placed a some pixels over the field...

i have noticed, that in most cases when i test the application on devices, the text is wrongly placed within the textfields, and that the buttons doesnt work properly, what i have noticed about the btns is that it seems that the btns press area moves some pixels up to, this makes it very hard to press the buttons… does this happen with anyone else? check the picture, and you will see what i mean.