If the player throws a trident, leaves, then comes back, the trident will have disappeared.

Video demonstration: https://youtu.be/AjRWbtP6iL8

I found this easy to replicate by throwing a trident, flying a few hundred blocks away to unload the trident, then coming back to where I threw it.

The trident is supposed to still be thrown, stuck in the ground. Instead, it has disappeared altogether. Reloading the world or leaving and coming back does not make the trident reappear.

Trident killers are a common way to kill mobs in mob farms. This bug can negatively impact trident killers by effectively deleting the tridents they need to function.