Throwable Javelin disappearing completely and cant be picked up.

[Edit] 3 cases so far
Phantom: Phantom dashing at the player, the player throws javelin hits the phantom but no actual hit happens and javelin completely disappears
Creeper: Throw javelin first time, hit the creeper. Creeper is bleeding. Throw javelin again, hit creeper at bleed tick and javelin disappears.
Zombie: No particular events, just javelin entity disappeared after hitting

Both javelins were iron spearhead (tempered and serrated), iron light handle (wrapped with string), string binding,

Please update this to adhere to the template for bug reports.

I did some testing and closed the issue, not necessarily a bug but a small issue with attack speed. I'll do more testing and if that post a proper bug report