here is a video, it seems like a bug.
I'm standing the aoe from Hyper Beam but I don't take any damage because Bebop can't see me.
as soon as I move into Bebop's line of sight I take damage from the AOE.
most aoe abilitys are coded this way to prevent damage occurring through walls. this is an unfortunate side effect of that. a potential work around could be making the aoe ray cast from the point of impact.