Relevant code sample:

ExperienceOrb orb = (ExperienceOrb) location.getWorld().spawnEntity(location, EntityType.EXPERIENCE_ORB);
orb.setExperience(1);

When spawning a EntityType.EXPERIENCE_ORB or EntityType.DROPPED_ITEM entity using World#spawnEntity, the entity is spawned at the wrong location. Specifically, the entity is spawned at (x, z, z) instead of (x, y, z). This bug is a regression which was introduced by craftbukkit#1306.

Here are the relevant lines of code:

• CraftEntityTypes.java:369
• CraftEntityTypes.java:375