[4.0.Neutronium] Header from previous page on navigate back

Ionic version:

[x] 4.0 Neutronium

I’m submitting a …

[x] bug report [ ] feature request

Current behavior:

When I return from a page, the header of the previous page appears for some milliseconds and disappears.

Expected behavior:

Do not display the header of the previous page on the current page even if it is for a few milliseconds.

Steps to reproduce:

Related code:

ionic start bug blank
ionic cordova platform add ios
ionic g page example

add <a routerLink="/example">Go to Example</a> to ion-content in home.page.html

add <ion-buttons slot="start"><ion-back-button></ion-back-button></ion-buttons> to ion-toolbar in example.page.html

ionic cordova run ios

Click in Go to Example then, click in back arrow.

Other information:

Example repository: https://github.com/ludufre/ionic-v4-back-bug

Ionic info:

Ionic:

   ionic (Ionic CLI)             : 4.9.0 (/Users/ludufre/.npm-packages/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.0.0
   @angular-devkit/build-angular : 0.12.3
   @angular-devkit/schematics    : 7.2.3
   @angular/cli                  : 7.2.3
   @ionic/angular-toolkit        : 1.2.3

Cordova:

   cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)
   Cordova Platforms     : ios 4.5.5
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 2.3.2, (and 4 other plugins)

System:

   Android SDK Tools : 26.1.1 (/Users/ludufre/Library/Android/sdk)
   ios-deploy        : 1.9.4
   ios-sim           : 7.0.0
   NodeJS            : v10.15.0 (/usr/local/bin/node)
   npm               : 6.7.0
   OS                : macOS Mojave
   Xcode             : Xcode 10.1 Build version 10B61

[gigocabrera]

I’m also having the exact same issue and I created a repo that reproducces this behaviour in Safari and iOS:

https://github.com/gigocabrera/ionic4-toolbar-issue

[ludufre]

Still not fixed yet in 4.0.1 update.