bug: [Ionic 4.6.0] Icons not loaded in prod using relative path

Bug Report

Ionic version:

[x] 4.6.0

Current behavior:

Building ionic app with ionic build --prod and publish it in prod environment. Load the app then icons are not displayed.

Expected behavior:

Should be able to load ionicons. This was working perfect when @ionic/angular@4.5.0. We had to downgrade to 4.5.0 :c

Steps to reproduce:

Upgrade from 4.5.0 to 4.6.0 version, building ionic app with ionic build --prod and publish it in prod environment

Other information:

Ionic info:

Ionic:

   Ionic CLI                     : 5.1.0 (/usr/local/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.5.0
   @angular-devkit/build-angular : 0.13.0
   @angular-devkit/schematics    : 7.2.3
   @angular/cli                  : 7.3.1
   @ionic/angular-toolkit        : 1.4.0

Cordova:

   Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
   Cordova Platforms : ios 5.0.1
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 3.1.2, (and 14 other plugins)

Utility:

   cordova-res : not installed
   native-run  : not installed

System:

   ios-sim : 8.0.1
   NodeJS  : v10.16.0 (/usr/local/bin/node)
   npm     : 6.9.0
   OS      : macOS Mojave
   Xcode   : Xcode 10.2.1 Build version 10E1001

[DavidWiesner]

I have the same issue. I have an ionic site in a subfolder e.g.: example.com/backend/ of my server. But the production build will try to load the icons from the absolute path /svg/ so from example.com/svg/ and this will fail because all icons are in example.com/backend/svg/. Also in android/ios apps the icons disappear after updating to ionic 4.6.0. This issue may is a duplicate of #18614 ?!

[jakechen0816]

same situation, after rm -rf node_modules and re-run npm i does not work. 404 Error 0.0.0.0/svg/md-menu.svg