A couple quick hotfixes have been posted yet again for WoW.
Good news everybody! No, the slime is not flowing again, but Black Temple Timewalking lockouts are now fixed. When the first Timewalking raid came out on Tuesday, players quickly found out that the raid lockout was working like Mythic: players were locked to the instance ID rather than per boss. This meant that people could not join another fresh or in-progress group if they had already killed bosses. The lockout issue will be resolved with realm restarts in the morning.