https://output.jsbin.com/zulabic Click start, call. Expected: See two video tags with local and remote copies of webcam playing, and plays audio. Actual: Crashes / locks up 50%+ of the time. Also generally plays buzzing noise instead of correct audio when it does come through.
Created attachment 316626 [details] crash dump
The crash is in STP on Sierra. Is the crash also occurring on High Sierra? I wasn't able to reproduce the crash.
*** This bug has been marked as a duplicate of bug 174932 ***