Poke the Spout telporter so the correct packets are sent. Somebody should put together a better solution to this.

src/main/java/com/sk89q/worldedit/spout/SpoutPlayer.java

@@ -114,6 +114,7 @@ public void setPosition(Vector pos, float pitch, float yaw) {
         entity.setPosition(SpoutUtil.toPoint(entity.getWorld(), pos));
         entity.setPitch(pitch);
         entity.setYaw(yaw);
+        player.getNetworkSynchronizer().setPositionDirty();
     }
 
     @Override