https://www.gamespot.com/articles/fortnite-update-fixes-floating-rings-challenge-acc/1100-6458537/

Epic Games is in the process of rolling out a new Fortnite hotfix update that's intended to resolve two new problems that have emerged since the launch of the recent 3.6 patch. One of these addresses an accuracy issue that emerged from one of the patch's changes, while the other seeks to improve the new floating rings that were added with the final set of Season 3 challenges.