https://www.polygon.com/fortnite/2018/7/19/17590802/epic-fortnite-playground-mode-matchmaking

On June 27, Epic Games released Fortnite’s Playground Mode and for one brief moment it seemed like the entire Fortnite community descended on the game at the same time, all in the hope of trying out the highly anticipated mode. Unfortunately, under the weight of so many players trying to start games, Fortnite’s matchmaking system crumbled and Playground had to be taken down for a few days of maintenance. But after some server fixes, the mode returned a few days later, good as new.

While this explanation, and the actual release of the mode, sated most fans’ curiosity, Epic wasn’t satisfied. So, on Wednesday night, the company released a detailed explanation of what happened to Playground mode, Fortnite’s matchmaking system and how Epic fixed the problems.