https://thenextweb.com/apple/2019/09/24/apple-release-ios-13-1-squash-bugs/

Apple today released iOS 13.1, hot on the heels of last week’s iOS 13. While it does have a few actual features, and welcome ones at that, the main purpose of downloading this update will be to fix the numerous bugs that came with iOS 13.

Cautious users might have avoided upgrading to iOS 13 after Apple released it last week, because it was riddled with bugs. Apps crashed, screens froze, pictures got all jumbled up with random dates and times — it was a mess, and far more so than you might expect from a major iOS update. Reportedly, even the Department of Defense was encouraging employees to hold off on upgrading because of potential security flaws in the new update.