A couple of my bigger ornates recently strarted doing the same thing.
Just as u said they went from viciously attacking the food as soon as it was in the enclosure to me having to place it in their mouths. I didn't really think much of it, seeing as tho they are still eating the same amount and appear to be just as healthy as before. Hopefully this isn't a sign of some problem that I haven't spotted yet but I doubt it is..