Apple’s newly released iOS and iPadOS 13.2.2 came with a fix for a bug which caused apps to close down in the background faster than usual.
The iOS 13.2.2 update also fixed an issue where iPhones temporarily lose mobile signal after a call. There is also a fix for an issue where mobile data temporarily goes off that was also fixed in this update.
Issues with trying to charge while using a Lightning port-enabled Yubikey for two factor authentication have also been fixed along with abug that causes certain emails (those that were S/MIME encrypted) to be unreadable in the iOS 13.2.2.
You can update your iOS from your settings.