1. Using Motion Director.
2. Load Character CC4 Kevin.ccAvatar.
3. Load this hair to Avatar. (Prime Hairstyles - Center part curtains.rlHair OR Ear length Bob.rlHair).
4. Start Motion Director. Move character using "W" key for example.
5. Stop.
6. Go to Macro Data.
7. Preview Macro Recording. Hair detaches from Avatar.
Note: This only happens on some Avatars and some of the Prime Hairstyles but it definitely happens on the above combination.
This only affects the Preview. If a motion clip is created it works fine.