The move Uproar seems to be working in a funny way...

Instead of acting like petal dance, forcing your pokemon to keep performing Uproar for 3 turns, (While petal dance lasts from 2 to 3, even if it seems to be a bugged move aswell, being able to last 4!) the skill perform a double hit on the enemy, without any further aciton, letting your pokemon able to permorm a different move next turn.

tltr: It works like double slap!!

Did you use it against a ghost type pokemon or a protected pokemon? If so, Uproar fails against a Ghost-type Pokémon, a protected Pokémon, or a Pokémon with the Ability Soundproof, Uproar and its effect will immediately end. Have a good day. But wait, did it hit? I never used the move.So don't know much about it

Yes, the move hits twice, acting exactly like a double slap, exepct for the fact that it attacks 2 times always. Also it seems that the power it's around 50, not 90 as it should be if properly coded.