When I shoot a dragon fireball and set its direction, its movement is far from smooth. It does go towards the correct direction, but it strays off its path a lot, making a kind of strange half circle and then suddenly teleports back onto its path.

Expected behavior: In 1.16.5 and earlier the same code made the dragon fireball go straight towards its target.

Code:

Entity ent = ....;
Vector forwardDir = ent.getLocation().getDirection();
Location loc = ent.getLocation();
loc.add(forwardDir.clone().multiply(10).setY(-1));

DragonFireball fireball = loc.getWorld().spawn(loc, DragonFireball.class);

fireball.setDirection(forwardDir);

I attached a video of the strange movement (the fireball is shot from the head of the EnderDragon).