On review pages, when I click on badge progress, I see vertical white lines that are out of place in the pop-up that then appears. Seems to be a CSS issue.
I'm just saying this unsightly bug hasn't gone away, so I'm posting an answer. It's one way to bump the OP's post…
I would describe it as: thin white and blue lines bleeding into the “Badge report”
When I click on the progress bar on the review page, white horizontal lines appear
And if I click on the review tab, you can see the same thin blue lines bleeding into the report