External angular element loading multiple times (v8)

[paulogr]

🐞 bug report

Affected Package

The issue is probably caused by package @angular/elements or @angular/cli

Is this a regression?

No

Description

The problem occurs when trying to load dynamically an external angular element inside another angular project.

🔬 Minimal Reproduction

https://github.com/paulogr/v8-ng-element-issue

🔥 Exception or Error

🌍 Your Environment

Angular Version:

Angular CLI: 8.0.2
Node: 12.3.1
OS: darwin x64
Angular: 8.0.0
... animations, common, compiler, compiler-cli, core, elements
... forms, language-service, platform-browser
... platform-browser-dynamic, router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.800.2
@angular-devkit/build-angular     0.800.2
@angular-devkit/build-optimizer   0.800.2
@angular-devkit/build-webpack     0.800.2
@angular-devkit/core              8.0.2
@angular-devkit/schematics        8.0.2
@angular/cli                      8.0.2
@ngtools/webpack                  8.0.2
@schematics/angular               8.0.2
@schematics/update                0.800.2
rxjs                              6.4.0
typescript                        3.4.5
webpack                           4.30.0

Anything else relevant?

[paulogr]

Closing this issue as it's related to #23732 (comment)

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