It could be because he is close to the 4th ideal but I think it could also be for the same reason that Vinli is immune to the suppression field also. In her case she has a void spren but with Kaldin I think it's because he is under Odium's influence. The proof is that Odium was directly touching Kaladin's dreams during this book in an attempt to corrupt him. And the change of eye color seems to point in this direction.
Also some say that Brandon stated that Kaladin wasn't burning void light when he was using his abilities but he didn't say that "Kaladin wasn't infused with void light."