If it makes you feel better, you can assume that Xiuhan have had less moments lately because SM told them to keep a low profile.
Luhan started wearing that Cartier love bracelet recently, remember? ;)
When Tao started wearing his at first he was really obvious but after a while he made a status about how he was supposed to keep a low profile. Maybe Luhan just listens better than Tao does.
This may not be the real reason, but if it makes things seem better for you, you should think this. ;)