Hi,
The scrollbar script was recently switched to a different one, so I am guessing it is only the browser cache. By default, that scrollbar is hidden, until the user hovers over the results, or starts scrolling: https://i.imgur.com/5hRPI10.png
Clearing your browser cache should fix this issue immediately. You can also change the scrollbar appearance, to show it all the time: https://i.imgur.com/x2INFSH.png
