so, I have fought ponce de gibbon about three times. and maybe like all or all except one of the times, the next round when ponce de gibbon is going to cast humungo frog, over bellow his health amount, it shows me that he is going to cast humungo frog the next round. I realized, this has happened with no other spells, only humungo frog. is this a bug or something from a while ago?
That happens when Pone De Gibbon casts beguile on you. Have you noticed that on that round you can't attack him with a single target spell? The beguile spell swerves you to his side for a single round. In that round you can see his spells and I suppose he could see yours. (if he were real)