I have angular WebRTC app that works with zone.js 0.8.12 but breaks with zone.js 0.8.18.
I tried both pc.addEventListener() and pc.onX callbacks.
Issue #883 and PR #905 are related.

I'm using adapter.js that polyfills some of the RTC objects.

Change detection is unpredictable in different browsers when using zone.js with adapter.js.
On some browsers RTCPeerConnection callback run inside the zone and on others outside the zone.
For example pc.onicecandidate=callback or pc.addEventListener('icecandidate', callback) run inside the zone on Chrome but outside in Firefox and Safari.
I've been fighting zone.js for days and it changes on each zone.js / adapter.js release.