Getting Cannot read property 'polyfillWrapFlushCallback' of undefined on a custom element

[jz1494]

Description

Using a Polymer Ui Library whichs uses custom webcomponenets, when i am using this with Angular universal getting below error on build.

Version

@webcomponents/webcomponentsjs": "^2.8.0"
Angular : 11.x
@polymer/polymer": "^3.5.1"

[stale]

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