There seems to be a bug when using lighthouse, can anyone explain this?

Question

So I noticed this bug while generating a report with lighthouse on a certain site. After finishing, I closed the inspector and clicked on a random link within the site e.g About Page, however there seems to be a black space left behind. I tried running this on several sites, on some sites it shows up, on some it doesn't. Stack-overflow is one of the sites where it does show up.

Is this an issue with google chrome or with the lighthouse plugin? I haven't tried any other web browsers such as Firefox as I don't know how to use their auditing tools.

Thanks

Image attached for reference:

EDIT: Pressing CTRL+SHIFT+I populates that blank space with the inspector tool