https://techcrunch.com/2019/11/07/ios-13-2-2-fixes-bug-that-kills-your-background-apps-prematurely-whats-new/

Does it feel like your iPhone is being a little quick to shut down apps running in the background lately? Go update it.

Apple has just released iOS 13.2.2, which patches up this issue (which caused background apps to “quit unexpectedly”) along with a handful of other annoyances. While it doesn’t offer up anything in the way of big new features, it’s probably worth the update just to make multitasking work the way it’s supposed to.