If the spectator mode camera is against a block, the camera will not move unless the spectator head moves far enough away. This is caused by the camera respecting block hitboxes.

Steps to reproduce:

1. Make your spectator camera go against a block, but not in the block and be in f5 mode viewing the back of the spectator head
2. Move foreword
3. X ---> the camera will not follow the head unless it gets far away enough