Tome 15, part 2, I want it I got it (can't be completed)

AlexTheInsignificant

Not sure if I'm the only one or if anyone else is struggling with it (haven't found any post about it) but this skull merchant challange is impossible to finish I have both marked injured survivors and injured survivors with clawtrap and then downed them but this challange didn't complete.

I tried doing different tome and then doing it again, I tried re-selecting it, restariting the game and neither worked.

Any advice how to finish this?