Before expanding comments on the question, there is a "1 deleted comment" widget next to the accepted answer:
When I expand the comments on the question ("show 5 more comments"), the widget stays in the same position on the page, rather than scrolling with the accepted answer:
This is slightly confusing and it would be nice if this didn't happen. I have not seen this behavior before today, so I suspect it could be related to the sticky vote controls A/B test (but then again, maybe I just haven't performed this sequence of steps before).