🐞 bug report

Affected Package

"@angular/router": "^7.2.5",

Description

In attached stackblitz.

1. Click 'scroll to A'. Page correctly scrolls to anchor A.
2. Scroll the browser window back to top of page.
3. Click 'scroll to A'. Page does not correctly scroll to anchor A.

🔬 Minimal Reproduction

https://stackblitz.com/edit/angular-q641ci

🌍 Your Environment

"dependencies": {
"@angular/common": "^7.2.5",
"@angular/compiler": "^7.2.5",
"@angular/core": "^7.2.5",
"@angular/forms": "^7.2.5",
"@angular/platform-browser": "^7.2.5",
"@angular/platform-browser-dynamic": "^7.2.5",
"@angular/router": "^7.2.5",
"core-js": "^2.6.5",
"rxjs": "^6.4.0",
"zone.js": "^0.8.29"
}