I had a trident enchanted with Loyalty III, Channeling, Impaling V, Unbreaking III and Mending. During a thunderstorm at night, I took aim at a phantom many blocks in the air, threw and missed and never saw the trident again. Seconds later and very close to where I had been standing when throwing the trident, a pack of Skeleton Horsemen spawned and attacked. I didn't notice them before throwing the trident, but it did seem as though they spawned shortly after.

After the storm ended and I had dealt with the Skeletal Horsemen, I created a new trident with the same enchantments by using the cheat codes. I attempted to recreate the throw, but the trident returned each time. I did not change the weather back to thunderstorm and did not change the day cycle to night when doing so.