Could just be my false impression, but I think Apocalypse uses that move (more often?) during Rage. The loss I recall is when I stayed in Rage for a substantial period, eating several of those in a row. Going into Rage with Blind on your characters could result in that sort of circumstance.
On the bright side, a few losses here and there isn't going to substantially harm your Core farming. You're going to need at least 90 of them per SSR kamihime you want to awaken, so farming Ragnaroks is going to be a regular affair for a long, long time.