Lighthouse PWA failing audit - NO_TRACING_STARTED

[sertovs]

Since a week or two Lighthouse PWA audit "Page load is not fast enough on 3G" is failing with a message "Something went wrong with recording the trace over your page load. Please run Lighthouse again. (NO_TRACING_STARTED)
" - see https://www.webpagetest.org/lighthouse.p...&run=1#pwa.

This happened on our private instance as well - since Chrome was upgraded on the agents to v64. It doesn't reproduce when running from Chrome (audits tab or the extension).