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

[huoguozhang]

Lighthouse Version: 4.0.0
Lighthouse Commit: bfa10f1
Chrome Version: 71.0.3578.98
Initial URL: https://juejin.im/timeline
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-bundle.js:18842:15)
    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.