Angular 7 SSR - problems with NgZone
ZoneJS does not work properly as an AMD module. You are using the SystemJS AMD extra and zone.js is bundled to UMD format -- this results in Zone being used as an AMD module which triggers the broken behavior
Full explanation, and issue on zone.js - https://github.com/angular/angular/issues/36827
Minimal demonstration of the problem - https://codesandbox.io/s/quirky-antonelli-2kusz?file=/index.html
Workaround - https://codesandbox.io/s/sweet-shape-18x7b