The recording indicated there was a bug. Not sure if that's from my site or the tool.
We are automatically tagging recordings where the visitor experiences an error state in the browser console. They may be unaware of it or it may be impacting their experience on the page.
We are not able to tell you the exact error due to privacy rules. But, if you see many of them in your recordings, I recommend looking at the browser and page that it is triggering for. Then try that combination on your own computer and use the developer tools in the browser to check the console for the error.