Single animation not playing in Build while everything plays in Unity

All of my animations play fine in Unity but once I build my game and play it, only one of the animations doesnt play, the Idle animation which is set to default.

The character is an broken egg and the Idle animation that wont play is the top egg shell bobbing up and down. It seems that the animation is called however I think it might have something to do with the armature that controls that movement that freaks out somehow when I build