You always had to, it doesnt have a CD though, but now it has this minor inconvenience added to it. Usually it can stick for days or years with out reactivation and it used to not be dispellable before either, but now it is and disarm dispels it from your character too, for some reason. Though its meant to be a supernatural ability of the Silverstar that is automatic to any of those specific weapons you equip, hence why it has no CD.
Oh well its not a game breaker, just strange design choice that seems more to be for inconvenience than anything else. Most similar abilities reactivate on the weapon once equip again, as Moons Hand used to as well. Now its a weapon buff in technical terms like a keen edge or annoint weapon, which both stick through disarms, but can also be dispelled.
Edit: The wiki and class description should probably be updated to specify, this is not an automatic ability, but an active weapon spell you have to cast before equipping said weapon, not whilst it is in your hand, the game doesnt register that. So it is really finicky now.
Any mace wielded by a level three silverstar is treated as if it were a +1 heavy shock mace (+1d8 electrical). It loses these abilities if it leaves the hand of the silverstar. At sixth level the weapon is treated as a +2 heavy shock mace (+1d8 electrical). These abilities do not replace or stack with already existing enchantments. On reaching level nine a Silverstar using her moon's hand ability treats her weapon as if it were a +2 shocking burst weapon (+1d8 electrical +2d8 massive critical).
Use: Automatic (Note: this feat applies to mace, warmace and morningstar.)