Wasn't the memory alteration 2000 years ago or however long ago it was when first Melheiz crossed the wall? The "attack" I was talking about in chapter 65 happened in the current time, like it'll be happening behind the scenes in the manga soon-ish. Or are you saying that time was Kanon as well?
If this 2nd, more recent attack really is Kanon, or more like Ray at this point, then it feels like more of a plot hole than a red herring. Though I guess you could argue that Ray was confident that Anoth could safely deal with whatever problems arise, but then why brainwash Melheiz a 2nd time and put his foster mother at risk? Some kind of convoluted plan to make Anoth strengthen her legend?