UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/60.0.3112.113 Chrome/60.0.3112.113 Safari/537.36

Steps to reproduce the problem:
1. ensure experimental web platform features are on so native addTrack is available
2. make a call on appear.in

What is the expected behavior?
all is well. It still is without the experimental web platform features flag

What went wrong?
video freezes after some time

Did this work before? Yes M60

Does this work in other browsers? N/A

Chrome version: 61.0.3163.71  Channel: n/a
OS Version: 
Flash Version: Shockwave Flash 16.0 r0

for hbos@
I bet this is a case of garbage collection. Blocks #760107