react-native-router-flux: hideTabBar is broken when used in nested stacks/scenes

Version

Tell us which versions you are using:

• react-native-router-flux v4.0.2 (latest master)
• react-native v0.56.0 (Example App)

Expected behaviour

hideTabBar on any Scene hides TabBar when that Scene is presented (as previously)

Actual behaviour

TabBar keeps on showing

Steps to reproduce

Slightly modified the Example app, added tabs to the root Stack, and added hideTabBar to the register Scenes, I have the same structure in my app. Previously using 4.0.0-beta.28, TabBar was hidden when the Scene with hideTabBar got presented, now it isn’t.

      <Stack hideNavBar tabs key="root" titleStyle={{ alignSelf: 'center' }}>
        <Scene key="echo" back clone component={EchoView} getTitle={({ navigation }) => navigation.state.key} />
        <Scene key="launch" component={Launch} title="Launch" initial />
        <Stack key="customNavBar" hideTabBar titleStyle={{ alignSelf: 'center' }}>
          <Scene key="customNavBar1" title="CustomNavBar 1" navBar={CustomNavBar} component={CustomNavBarView} back />
          <Scene key="customNavBar2" title="CustomNavBar 2" navBar={CustomNavBar} component={CustomNavBarView} back />
          <Scene key="customNavBar3" title="Another CustomNavBar" navBar={CustomNavBar2} component={CustomNavBarView} back />
          <Scene key="hiddenNavBar" title="hiddenNavBar" component={CustomNavBarView} hideNavBar={true} back />
        </Stack>
        <Stack back backTitle="Back" key="register" duration={0} navTransparent>
          <Scene key="_register" hideTabBar component={Register} title="Register" />
          <Scene key="register2" hideTabBar component={Register} title="Register2" />
          <Scene key="home" component={Home} title="Replace" type={ActionConst.REPLACE} />
        </Stack>