Currently, when flying downward with fireworks using an elytra, the player does not gain immediate acceleration like they would with a Riptide trident. Instead, they must wait for the firework boost to expire before gravity takes full effect. It would improve control and consistency if downward boosts provided immediate acceleration, similar to Riptide tridents. Not sure if this is intended behavior or an oversight.
(This probably affects all versions with elytra but i don’t know how to choose all versions in the 'affects versions' section above)
Please edit your report to change the Affected Version to the version shown on the Minecraft title screen