I've heard that there were bugs regarding "Disco Fever", a taunt reaction. The reporter didn't specify which one out of the 3 Disco Fever taunt reactions that exist in the shop. Seeing as he also mentioned how the "Shred Alert" taunt reaction series are malfunctioning, please have a check at the entirety of the taunt reactions.
The issue was regarding audibility. The reporter couldn't see the effects. I will look more into this and see if other players have the same issue. Still, 2 people looking into one issue would spur resolution.