Please check screenshot. There is no scrollbar outside the popup to scroll down and make the pop up central to the screen. Therefore I am not able to see the badge list.
OS - Windows 10
Browser- chrome 76.0.3809.100
Device - Asus VivoBook S14
I see the problem. It does not change placement depending on the size of the browser window. It places the top of the popup at a particular distance from the top of of the window, regardless of the total height of the window. I was also able to reproduce it on Chrome on a Mac.
I fixed it with the "command -" shortcut, which is the Mac version of "zoom out" (in the "view" menu). On Windows machines, use "control -" (the shortcuts are in quotes because that hyphen/minus key is in fact the key you use and not the usual separator to tell you to push both keys at once).
Be sure that you use the above command or another that is meant to change the size on the current page. There are other commands for changing them on every page.
That said, this is a bug IMHO. I would check on Meta StackExchange and see if it's been asked. If not, post it. I did a quick search and don't see this question, but you should also check. Warning: Meta users can be a bit harsh so don't take it personally if they don't like your question. Post a link here so we can all go weigh in.