Steps to reproduce:

• react-native init MyNewApp1
• react-devtools
• Open Xcode, select dev team and automatic signing and start build to connected iPhone XS device

Environment:

  React Native Environment Info:
    System:
      OS: macOS 10.14.3
      CPU: (8) x64 Intel(R) Core(TM) i7-4960HQ CPU @ 2.60GHz
      Memory: 1.88 GB / 16.00 GB
      Shell: 3.2.57 - /bin/bash
    Binaries:
      Node: 11.7.0 - /usr/local/bin/node
      npm: 6.8.0 - /usr/local/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1
    IDEs:
      Xcode: 10.1/10B61 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.6.3 => 16.6.3
      react-native: 0.58.6 => 0.58.6
    npmGlobalPackages:
      react-native-cli: 2.0.1
      react-native-git-upgrade: 0.2.7

Mobile Device:

iPhone XS, iOS 12.1.4

Screenshot: