This affects FF4A, but probably also FF4 (although it would not normally be possible).
It's a very simple test. Sylph as we know heals everyone based on the damage dealt and the # of targets on the field.
Normally, healing in general excludes those that are hidden (Edward) and those that are jumping (Kain), not just the dead.
Apparently Edward is able to be healed while hidden...
Some pics:

See Edward was healed?!?!

Killed the stupid "Share this Image on Twitter!!!!111" garbage ImageShack now loves to attach to your images now. Thankfully, they're currently doing it by just adding another image tag to the bbcode; they're not actually appending that crap to your images (yet, I'm sure that's next). -DKK