Ionic 4 Android APK crashes when opening inAppBrowser '_self'

I’ve built an Ionic 4 app which uses the inAppBrowser component to open an external website at some point of the app flow.

The app is working great but when testing it with real Android phone crashes and the app closes.
Browser, iOS, emulators… all working fine. Only real Android devices crashing when the this.browser.create(url, '_self') is called.

I’ve tested all kind of things. Like putting the code in different modules and different parts of the app workflow.
Also tried to grep the java output from the device, but it’s not returning any error message at all.

This is my last try, a very simple approach. But its also crashing:

  initializeApp() {
    this.platform.ready().then(() => {

      const browser = this.iab.create('', '_self');

      browser.on('loadstop').subscribe(event => {
        // this.splashScreen.hide();

I have the module imported correctly and also the <allow-navigation> tag at the config file.