craftbukkit/nms-patches/net/minecraft/world/entity/monster/EntityGhast.patch

--- a/net/minecraft/world/entity/monster/EntityGhast.java
+++ b/net/minecraft/world/entity/monster/EntityGhast.java
@@ -331,6 +331,8 @@
 
                         EntityLargeFireball entitylargefireball = new EntityLargeFireball(world, this.ghast, d2, d3, d4, this.ghast.getExplosionPower());
 
+                        // CraftBukkit - set bukkitYield when setting explosionpower
+                        entitylargefireball.bukkitYield = entitylargefireball.explosionPower = this.ghast.getExplosionPower();
                         entitylargefireball.setPos(this.ghast.getX() + vec3d.x * 4.0D, this.ghast.getY(0.5D) + 0.5D, entitylargefireball.getZ() + vec3d.z * 4.0D);
                         world.addFreshEntity(entitylargefireball);
                         this.chargeTime = -40;