UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36

Steps to reproduce the problem:
1. have animation on canvas
2. create WebRTC stream from it (captureStream)
3. canvas stops refreshing even though animation JS code keeps drawing

What is the expected behavior?
canvas displays up-to-date contents

What went wrong?
Canvas stopped repainting itself. See attached video - chrome.mov. It works in FF (ff.mov). Also works in safari and in Canary (68.0.3438.0).

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 66.0.3359.181  Channel: stable
OS Version: OS X 10.13.4
Flash Version: 

In the repro file canvas repaints itself once in a while. If you lower canvas resolution to 300x150, repaining starts to work.
If WebRTC is streamed thought PeerConnection, the receiver observes same frozen image as rendered locally.
 

Deleted: canvas.html 1.3 KB

canvas.html 1.3 KB View Download

Deleted: chrome.mov 1.3 MB

	chrome.mov 1.3 MB View Download

Deleted: ff.mov 1.9 MB

	ff.mov 1.9 MB View Download