Labels are not appearing on my iPad Mini - Swift SpriteKit

As the title states - Labels appear fine on my iPad Air - iPhone 4 - iPhone 5 - iPhone 6+ but when i test it on my iPad Mini some Labels don't show, but it is only upon the first initial presentation of the scene - After i come off the scene and then open it up again all the labels will come back (well most of them) takes a couple of attempts to get all the labels to show. But it is only on the iPad Mini