The animation shows up differently in Roblox Studio and Animation Editor.
In Animation Editor:
https://gyazo.com/7fbd11f80db3850ef6e64434de861a6b
Roblox Studio:
https://gyazo.com/69577c0cd2d364108e560e13ff987df2
As you can see the head isn’t moving. Both the animations and models are exactly the same. I double checked to make sure there was a bone in the head.
Thank you!