Hi Remco,
Thanks for your answer. I wasn't aware of that setting, thanks. Typically, it sits in the bottom right of my screen. But now it started sitting in the middle of my screen and that, I think, is a (small) bug. To repro, what I did was connect remotely through TeamViewer, with a different screen resolution. After returning to my physical computer, it showed what I pasted in the screenshot.
It didn't react when I resized the VS main window. A possible solution is to bind it on the resize event (or WM message) of the main window. But I'm not sure it is worth the effort of fixing, considering the rather rare circumstances to get here in the first place.