Unable to use rockets to propel elytra flight

When I try to use rockets to propel the elytra, it just shoots the rockets in the air, even when the elytra is activated.

What I expected to happen was..:
To be able to use firework rockets to propel the flight of the elytra.

What actually happened was...:
I right clicked to use the rockets, and they just shot in the air.

Steps to Reproduce:
1. Get an elytra in creative mode and wear it.
2. Get rockets
3. Go into survival and use the rockets.