I created angular custom element and tried to use it on really complicated page (which I don't control, so there are another scripts running). In result zone.js starts catches and wrapping all unhandled rejections from outside of my component. And with one of this errors zone stops working completely.
I tried __zone_symbol__DISABLE_WRAPPING_UNCAUGHT_PROMISE_REJECTION = true but it didn't work, in fact I don't understand what it did at all, since nothing changed. I used it as in this example