When using Light and Dark Theme on the Backlog page, the Vertical scrollbar for Sprints Pane and Epics Pane have the thumb [webkit-scrollbar-thumb css] the same (or very similar) color as the background of the scrollbar [webkit-scrollbar-track]. This makes it impossible to actually use.
You can easily see the scrollbar when the Theme is set to "Original".
We seem to be using v.10 LTS
Dark theme

Original theme
