Change the text in the window when a soldier is turned into a zombie by a Chryssalid.
Sometimes, this brings confusion.
Instead of "(Soldier Name) has been killed", replace it by "(Soldier Name) has been turned into a Zombie".
And perhaps, change/add the sound when this happens.
UFOextender option: "More Chryssalid Sound Effects: victims will howl during zombification and newly emerged Chryssalids scream."
https://www.ufopaedia.org/index.php?title=UFOextender