When spawning mobs underwater on a block, they spawn in the player

When I spawn mobs underwater on a block that is farther than the player, it spawns the mob in the player instead.

Steps to Reproduce:

1. Go underwater
2. Aim at a block that is farther than the player
3. Spawn a mob on that block with a spawn egg

Observed Results:
The mob spawns in the player.

Expected Results:
The mob should spawn on the block the player was aiming at.