Blender animation doesn't import properly

Having a weird issue when importing a .fbx character from Blender to Unity. All my other animations play properly except for this face animation. Pictures bellow for Unity/Blender.


In Unity preview (don't mind the ears)


In Blender

The model rig is set to generic with no avatar and changing the avatar to "create from this model" doesn't seem to change anything. I'm so confused why only one of the animations has issues and I have no idea how to go on about fixing it.