I just played a game in battlegrounds on Finley => The Rat King and chose “The Golden Hammer” quest reward.
Once I got the reward the first minion I goldened was Lava Lurker, which is supposed to turn golden permanently due to its card text, and so naturally it did.
But then each time I used the Golden Hammer spellcraft on other minions (most notably on Brann Bronzebeard and Monstrous Macaw and Ball of Minions) they stayed golden permanently also, for the rest of the game. I had long sold the Lava Lurker by the time I goldened the Macaw and the Ball of Minions if that is of any relevance.
I assume this is not intended? I don’t understand how this happened.