You’re not the only one reporting this issue (but see the next post for a workaround):
@Eika, Queen Aurora’s 3rd trait currently fires only once per stage of a cascade. It works just like all the other * Link traits, which in turn work like all “on 4 or 5 gem matches” traits. Nimhain confirmed Tacet’s suspicion that this is not how Link traits are supposed to work. Unlike Tentacles or other legendary traits, Link traits were supposed to fire once per applicable match.