Extension Error: Protocol error (Tracing.start): Tracing is already started

[MagicMikeA]

Lighthouse Version: 3.0.0
Lighthouse Commit: d6aa441
Chrome Version: 67.0.3396.99
Initial URL: about:blank
Error Message: Protocol error (Tracing.start): Tracing is already started
Stack Trace:

Error: Protocol error (Tracing.start): Tracing is already started
    at Object.chrome.debugger.sendCommand.result [as callback] (chrome-extension://blipmdconlkpinefehnmjammfjpmpbjk/scripts/lighthouse-ext-background.js:17270:15)
    at safeCallbackApply (extensions::uncaught_exception_handler:27:15)
    at handleResponse (extensions::sendRequest:67:7)

[devtools-bot]

Howdy chief! Appreciate you filing this bug. 👏

We think this is the same root issue as #1091. So, we'll automatically mark this as a duplicate. Thanks!
🤖 Beep beep boop.