I have a floating white box on the bottom right of my screen

[BertieBotts]

It's covering where the advertising column is, but also going over the text when that stretches across the whole screen.

I'm on Chrome and not using adblock or anything like that.

Ah! Now it's changed to a floating white box stuck to the top of a floating chad valley video thing (which I can only see half of).

Just me then?

Shh or everyone will want one!
Very strange? We have reported to Tech who will take a look, in the meantime try shutting your browser completely and reopening and see if that helps?

It seems to have gone now. I had closed the tab and reopened it, so perhaps that fixed it.