iOS notch safe area inconsistent behavior

Ionic Framework
1

Hi,
I’m having issue with ion-toolbar paddings inside the safe area of iPhone 10+. At first the webview starts where it should (window.innerHeight = 862px) and after closing and reopening the app it starts below the notch (window.innerHeight = 814px) which push all the content including the header down.

See the gif below that works at first but then shows the wrong behavior.

Config :

Ionic:

   Ionic CLI                     : 6.9.3 (/usr/local/lib/node_modules/@ionic/cli)
   Ionic Framework               : @ionic/angular 5.5.0
   @angular-devkit/build-angular : 0.803.29
   @angular-devkit/schematics    : 8.1.3
   @angular/cli                  : 8.1.3
   @ionic/angular-toolkit        : 3.0.0

Capacitor:

   Capacitor CLI   : 1.5.1
   @capacitor/core : 1.5.1

Cordova:

   Cordova CLI       : not installed
   Cordova Platforms : not available
   Cordova Plugins   : not available

Utility:

   cordova-res (update available: 0.15.2) : 0.11.0
   native-run                             : not installed

System:

   NodeJS : v12.17.0 (/usr/local/bin/node)
   npm    : 6.14.4
   OS     : macOS Catalina
   Xcode  : Xcode 12.1 Build version 12A7403

What could be the issue here ? Thanks for the help.

2

I stumbled upon this cordova issue that looks a lot like my own issue : https://github.com/apache/cordova-plugin-wkwebview-engine/issues/108#issuecomment-607461878

3

I’ve just noticed that even when the body is correctly initialized (the first time) the html element is shorter (814px) than the body (862px)

epoc-bug-viewport
epoc-bug-viewport1865×1053 337 KB

4

First of all, sorry for the monologue.

I’ve found the solution. I had added in the past, trying to resolve another issue in Capacitor 1.x, a parameter in capacitor.config.json :

{
    ...
    ios: {
        contentInset: "always"
    }
}

This parameter is referenced here : https://capacitorjs.com/docs/config

Which caused the inconsistent bug but I cannot explain why…

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