Less elytra Y movement in Creative mode

In creative mode, when I fly with my elytra and double press space to creative mode fly (hovering in mid air), I stay elytra flying but when looking down or up I don't move as much.

Here is a video: https://drive.google.com/file/d/1mpSOAU6_OCcVWOF5QLX8c5SmTb00UrLG/view?usp=sharing

To stop this I have to press SHIFT until I land