The view moves forwards when moving upwards, for example by flying up, backwards when moving downwards, for example by falling. Since the player head is not moving at all I do not expect the view to change either.
- Change your gamemode to Creative
- Place a single slime block
- Stand on it
- Face straight down and start flying upwards for at least 50 blocks
- Start falling
→ The crosshair is in front of the slime block when bouncing up and behind it when falling down