More than likely it is growing, it's just breaking off once you gain a little length. What has helped me to maintain the length in that area includes doing scalp massages, keeping it moisturized with water and always oiling the ends - every night. I always had trouble with that section, but once I started to do those things, my hair back there actually grew and did not break off!

Here's another thing - be careful how you tie you scarf you go to sleep. The friction combined with the tossing and turning can lead to breakage.