This fork uses the beta-28 of react-native-router-flux to fix the "tab clicked twice" bud decripbed in this PR non-merged

In package.json

  ..
  "react-native-router-flux": "git+https://github.com/MadeInMoon/react-native-router-flux-beta-28.git",
  ..

Or by cli yarn add git+https://github.com/MadeInMoon/react-native-router-flux-beta-28.git