In the announcement it says:“Drops: Earn up to 3 packs from the next expansion while watching on Twitch (1 each day).” Wich would be The Lost City of Un’Goro packs. But the Twitch drops are Journey to Un’Goro packs.
Same thing happened to me. I got one Journey to Un’Goro pack and then 2 The Lost City of Un’Goro packs. I am not opening any until they change out that pack.
There was a second twitch drop on day 1 with an actual un goro pack for the next expansion