It's a swarm by this point!
LoL Bug Fix in Patch 13.6 Re-Introduces Previous Bug
In LoL Patch 13.6 Riot tried to fix a specific mana bug, only to great a new, and much worse one. Now, after a hotfix was shipped for LoL Patch 13.6, the initial bug is back in the game.
Riot is trying to fix their game, but it seems that they can't get the handle on this one specific mana bug, with it somehow constantly creeping back into the game, no matter what the developers and balance team try.
LoL Devs Reveal Old Bug Is Back
In LoL Patch 13.6, Riot wrote in the official Patch Notes that they fixed a bug wherein selling and then undoing the sale of an item, it would lower a champions total mana whenever they had biscuits from the Biscuit Deliver rune in their inventory.
This bug was fixed at the start of the patch, but brought forth new problems, wherein selling and undoing the sale of biscuits from the rune would increase a champion's total mana instead. Basically doing the exact opposite of what it had been doing before.
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In the hotfix patch, Riot reverted this change, but the official LoL Devs Twitter revealed that by changing this they've reverted the old bug back into the game, meaning that players could have their total mana lowered like it was previously.
We're aware that the biscuit delivery mana bug fix that came in the 13.6 micropatch has reintroduced the bug that caused undoing item purchases after getting a biscuit to decrease your maximum mana. We are currently working on a fix for this.
Players have responded in League of Legends fashion by memeing the tweet, basically thanking the spaghetti code that LoL is based off. With over 160 champions and multiple items and abilities though, it is a wonder that League actually runs though, right?
We will likely see a new bug fix in the upcoming LoL Patch 13.7, but who knows what other bugs this new fix will bring, eh?