Quick nav toaster decided to de-dock itself from the bottom of my browser screen
It's always done that.
If you scroll down to the suggested topics, the bottom of the nav always aligns with the buttons beneath the last post.
I took the screenshot at the exact wrong time to show the behavior. In my case, it would stay in a fixed location until it was moved by the browser window limits. As I kept scrolling, it would actually move in to suggested topics. It did not remain aligned with bottom buttons.