Child object in animation transform Problems

I have animated my child object’s transform and the animation seems totally fine in the scene view when you play it, and in the preview window.
but at runtime it totally static???
anyone have any idea what it is?

I know I’m 2 years late on this, but I came across this post because I ran into the same problem. The solution for me was to uncheck Apply Root Motion on the child object’s Animator component. Hopefully this helps any other lost souls who find themselves here years in the future.