This issue affects the Cha-Cha (from NFL promo) and Cha Cha (from In The Heights promo) Emote Animations, both of which were originally different emotes.
When all emotes were updated to receive Facial Animation support, these two emotes, due to their similar names, were mixed up. The version of In The Heights Cha Cha with facial animation overrode the NFL Cha-Cha, essentially becoming a duplicate of the In The Heights Cha Cha, with the actual In The Heights Cha Cha being left with no facial animation.
A proper fix to this issue would be giving the Cha Cha emote the animation currently displayed on the Cha-Cha emote (Animation ID: 10714018192). The original animation for the Cha-Cha emote prior to the bug is Animation ID: 3695322025, though keep in mind this has no facial animation support.
TL;DR: Change Cha Cha’s animation ID to 10714018192, change Cha-Cha’s animation ID to 3695322025 (though it has no facial animation support).