Despite my opposition to pic questions on the main site, I allow myself to post one on meta this time.
As shown in the screenshot, the badge tracker overlapped with the tabbed panes.
That's certainly a UX problem because the message at the bottom of the badge tracking got covered by the tab titles.
Perhaps SE company can look into this.
I'm using Firefox Quantum 62.0 (64-bit) on (X)ubuntu 18.04. This happens on both Xfce and GNOME.