I think, if I'm remembering right, the revelation in 5.2 was that Hydaelyn's auto-message was meant to hit anyone who awakened to the Echo, immediately, to her voice and her Blessing - to the point that the in-universe lorebooks attributed the Echo itself as "a gift from Hydaelyn." So, uh, her intent was probably to confuse the issue, honestly, what with how determined she was to completely erase the Ancients from history and keep them erased.