I only grow raff gigantea, and I can always see the next leaf, but trust me, its nothing to worry about. When the last leaf of my rajah unfolded, I couldn't see the growing tip for a few days, and now its back out and continuing to grow.
Even if you accidentally broke the growth tip and dont know it, it'll be fine. I've broken many of them, and the plant just lags for a few weeks, then resumes normal growth from the same point with a new growth tip