This happened to me as well when I tried using a Lightningrod Manectric against Erick though I never had any major, or otherwise blatant, issues with AI "clairvoyance" outside this particular fight.
That being said...Clairvoyant AI really, really, reeaaaally sucks. And it is the primary reason I dropped PokeMMO to sink like the Titanic in the depths of the darkest corner of my memory, and have not looked back ever since.