zIndex in a List

• I have reviewed the documentation
• I have searched existing issues
• I am using the latest React Native version

This is actually a reopen of my #16878 issue. I've got some thumbs up, so I think I am not the only one with this issue. This time I updated my example project to a pure rn project with the latest release (rn Branche)

Environment

info
  React Native Environment Info:
    System:
      OS: macOS High Sierra 10.13.6
      CPU: (8) x64 Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
      Memory: 94.53 MB / 16.00 GB
      Shell: 5.3 - /bin/zsh
    Binaries:
      Node: 10.12.0 - ~/.nvm/versions/node/v10.12.0/bin/node
      Yarn: 1.16.0 - ~/.nvm/versions/node/v10.12.0/bin/yarn
      npm: 6.9.0 - /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
      Android SDK:
        API Levels: 23
        Build Tools: 23.0.1
    IDEs:
      Xcode: 10.1/10B61 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.8.3 => 16.8.3
      react-native: 0.59.8 => 0.59.8
    npmGlobalPackages:
      react-native-cli: 2.0.1
      react-native-git-upgrade: 0.2.7

Steps to Reproduce

1. Make a list (FlatList or Array.map, it happens with both)
2. The renderItem should get an onPress event
3. The onPress event changes the style to a high zIndex and position absolute

Expected Behavior

I expect that the component with the high zIndex is over every other component.

Actual Behavior

It seems like it ignores the zIndex property. The behavior is exactly like I would not apply any zIndex. I can remove the zIndex and I get the same result.
Google Drive Link to a screenshot.

Reproducible Demo

Github Demo Project rn Branche This is just an extract out of my current rn project.
Expo Link (Not on the latest rn version)
Google Drive Video which show the issue

Inizia con il rn branch demo project collegato e riproduci il problema usando FlatList e Array.map, quindi verifica come vengono gestiti la posizione e zIndex del componente premuto. Confronta il comportamento con la configurazione React Native segnalata; il lavoro è completato quando il componente premuto con uno zIndex alto viene visualizzato sopra gli altri componenti dell’elenco.