Floating Upward in Water, Creative/Spectator mode

To crouch and maintain position in creative/spectator mode, normally you would both use the crouch and jump keys. This works perfectly fine in air.

However, in either of these modes, while using this technique underwater, your position changes as if you were holding jump while underwater in survival mode.

This should not be the case, especially in spectator mode, where movement is not affected in any way by environment.