Credit declined for last night's Flash Episode

So, last night's The Flash episode, What's Past Is Prologue, featured an appearance of the AI, Gideon. It's fairly well known that Morena Baccarin voices this character (at least, on The Flash. Legends of Tomorrow has a Gideon AI that is voiced by Amy Pemberton.) Of course, this could have changed but I doubt that it has.

If you look at Baccarin's filmography, you'll notice she is previously credited with this role, even if it is uncredited. (And, yes, I know the rules on uncredited voice work and I believe this meets those requirements.)

So, why did I get this?