League of Legends was temporarily thrown into chaos on Feb. 6 after a glitch reverted every Patch 13.1B change originally shipped onto live servers. Riot Games has since solved the surprise reversion issue, reloading the late January patch back into the game and re-enabling ranked and draft picks across the board.
Almost immediately after Patch 13.1B disappeared today, League ranked queues across the globe were disabled, suggesting Riot techs were already on the job.
Less than an hour later, Riot confirmed a rogue League bug had rolled the entire Patch 13.1B upload back temporarily, removing more than two dozen champion, item, rune, and map changes. The devs immediately disabled access to all competitive queues and began work on restoring the Jan. 26 update.
While the fix was underway, only Blind Pick queue was available.
“We are currently working on a solution,” the League techs said on the title’s official Twitter account just after 5pm CT today. “Thank you for your patience.”
In effect, League was stuck two weeks in the past for several hours. In particular, a horde of ADCs like Ashe, Caitlyn, Kai’Sa, Lucian, and Xayah, among others, lost their headlining mana changes, while 23 items from Black Cleaver to Navori Quickblades were reverted back to their original Season 13 launch states.
According to Riot Ray Yonggi, who addressed the bug on Discord, the error arose because 13.1B was a “hacky” update. When the League devs began staging Patch 13.3 onto the servers ahead of its release this week, the 13.1B instance was overwritten.
Several Season 13 changes that were shipped between Patches 13.1 and 13.1B, including a Fimbulwinter health upgrade and a handful of small Rammus buffs, were still available on live League servers.
The glitch also impacted Teamfight Tactics, which was rolled back to its 13.1 B-patch. The Riot autobattler has been on a 13.1 C-patch since late January.
Read: Riot forced to disable TFT Set 8 Ranked over patch rollback bug
This strange League patch reversion adds to what has already been quite a difficult few weeks for Riot in regards to its flagship MOBA game.
On Jan. 20, the heavyweight studio admitted it had been hit by a “social engineering attack” which threw the League and TFT schedules out of whack. Patch 13.2 was pivoted into 13.1B—the same one that just disappeared for several hours—and Riot warned players the next few updates may miss their launch dates. At the time of writing, the Feb. 6 revert is not expected to impact 13.3’s release.
Read: Here are the early League of Legends Patch 13.3 patch notes
Update Feb. 6, 8.40pm CT: A fix has been rolled out and League Patch 13.2B changes reloaded onto League servers ahead of Patch 13.3’s release on Wednesday.
