https://www.theverge.com/2018/12/19/18148645/apple-iphone-ios-12-1-2-china-sales-ban-qualcomm

Apple released a tiny update to iOS this week designed to avoid a sales ban in China. iOS version 12.1.2 contains software changes exclusive to China that are designed to circumvent Apple’s patent dispute with Qualcomm, which won an initial sales ban over claims that Apple violated a pair of its patents.

The update changes the animation for when an app is forced to close, according to MacRumors, seemingly avoiding a Qualcomm patent around app management. Previously a closed app would slide off the top of the screen, but it now shrinks and disappears into the middle of the screen.