.. just as I said.
Playing Wendy, placing the "flower" on the ground, and killing a snake in the vicinity does not summon her ghost-twin Aby.
With "vanilla" creatures like spiders it works okay.
Maybe it is also not working with some other newly introduced creatures, haven't tested it though.
Choose Wendy "the bereaved" to play. Place "abigail's flower on the ground, kill a snake on top of it, - nothing happens, Aby is not summoned.