I believe I have noticed this before, but shrugged it off as doing my math wrong. This time, I'm sure there's something wrong. I have just earned the Order of the Unicorn Salient badge, which is for 251 wins in Game of Crowns. With 60 seconds of crown-holding for every win, that's 15060 seconds with the Crown. That's way more than 12007 seconds, the number required for the Kingslayer badge. But I don't have the Kingslayer badge. Are seconds with the crown being counted wrong?
Edit: Another bug I noticed today, thought I'd put it here since it is also GoC-related. If you have all 3 players and a fourth joins the game, but doesn't press start and/or leaves, the game will continue waiting for players despite the fact that there's already enough players to begin.