Space bar allows to fly you up

Hello Mojang Studios,

I recently started flying on my creative world with elytra and rockets but to my surprise when I held the space bar I started going up. 

To recreate this bug:

1 Put an Elytra on

2 Start flying

3.Hold space bar

4 Watch as you rise to space

This bug allows you to fly without rockets. This shouldn't be allowed on Windows 10 because of parity and a redundancy to sugarcane/rockets. This is why it's private. It even says 'fly with rockets' on the 1.15 loading screens.

From,

Bailey