Inappbrowser opened in iOS goes missing after app open back from background

### Issue Type

- [x] Bug Report
- [ ] Feature Request
- [ ] Support Question

## Description
I open a link with the inappbrowser plugin. While the inappbrowser is open, I move the app to the background. Then I open it back to foreground and the browser goes missing.

## Information

I realise the issue is not appearing after I remove my splashscreen from config.xml where the default Cordova splashscreen image will appear instead.

### Command or Code

The line of config that was removed to fix the issue
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### Environment, Platform, Device

It is happening on iOS physical devices and simulator

### Version information

Cordova CLI: 8.1.1
NPM 6.4.1
cordova-ios: 4.5.5 & 5.1.1
cordova-plugin-inappbrowser: 3.0.0 & 3.1.0
cordova-plugin-splashscreen: 5.0.3

## Checklist

- [x] I searched for already existing GitHub issues about this
- [ ] I updated all Cordova tooling to their most recent version
- [ ] I included all the necessary information above

Reproduce the issue on an iOS physical device or simulator using the listed Cordova, iOS platform, InAppBrowser, and Splashscreen versions. Compare the custom splashscreen entry in config.xml with the default splashscreen behavior, and consider the issue resolved when the InAppBrowser remains visible after the app returns from the background in both configurations.

Written by the indexing model from the issue text.