Yeh, I would do that if I were you? You don't maybe have a dodgy screen protector or something? Or a fake s pen?
Going to speak to the Samsung Regional Manager on the weekend try get a replacement unit ffs. I have the original Body glove screen protector on and original S-Pen. Only ever used original accessories with this phone. Even spent the R800 for the S-view cover from Samsung :/. Phone is less than a month old