Been testing Yuumi a little in a Practice Tool on the PBE and found an inconsistency that needs addressing.
Upon casting W a target for the first time in a detached state, you will apply Aery + her passive shield, this is correct.
However, if you jump to another target directly with W, you will apply the shield (and Ardent Censer effects) but not Aery, even if its on cooldown.
Aery still works offensively, but will not proc again off the passive shield until you fully detach from champions again.
I believe this is inconsistent with how Aery usually works, otherwise, love the champion so far :)