So, me and my 2 friends got the famous "combat bug". Hearthstone seemed to fix it, but we got it again just a few minutes after.
Now, after disbanding the group, and doing several relogs and restarts of the game we cant invite one another. Each time o try to invite friend A it says that hes in a group, and friend B, well, nothing happens when i invite. And same thing for them.
Everyone in general seemed to say that "Heartstone" was the best solution, but since its on a 1 hour cooldown its not very effective