Apple has released their latest OS version, the iOS 12.1.3, which fixes message and CarPlay bugs in the previous version.
There are no new features but this patch fixes the error in Messages when scrolling down through your shared media history while another major fix is the disconnection issue of CarPlay in the iPhone XR, XS, and XS Max. Lastly, this patch fixes the audio performance issues for the iPad Pro 12.9-inch (3rd generation) and iPad Pro 11-inch when using third-party apps. To update, just go to Settings -> General -> Software Update.