With today's reset, some players were able to receive the quest introducing the Revival Catalyst despite the catalyst being unavailable until June 13th. The premature launch of this quest has now been fixed and players shouldn't receive this quest till next week's reset.
The Catalyst’s Boon quest became available a week earlier than intended. This quest just points people to the location of the Revival Catalyst which remained unavailable this week. Read more on wowhead.com