Life Drain occurs after troop is actually dead

What you were expecting to happen, and what actually happened?
Expected enemy troop will die. Actually its alive because of Life Drain trait.

What are the steps to make it happen again?
idk… specified behavior does not always happen.

Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!
yes. video here.

Yup this is a known bug with Bombot (or any troop that kills itself) and Life Drain. Check out some of our discussion here on it:

@Ozball I see. ty.