The walkOneCM, sprintOneCm, and crouchOneCm statistics do not increment while the player is in the air. This leads to a much lower distance registered when the player is constantly jumping.

I could understand this being intended for walking, as it's just normal movement in the air once the player jumps. However crouching and sprinting both cause a different movement speed, which continues while the player is in the air. There is a difference between a sprint-jump and a regular jump, and this should be reflected in the statistics.

The same problem occurs when swimming. (What matters is the OnGround tag.)