The file browser dialogs are severely broken on Windows. There are 2 issues:
1.) The scrollbars in both the left and right-hand panes are overlapped by the content, and neither scrollbar is functional.
2.) The content is truncated, in that only a certain (apparently arbitrary) number of files/folders are displayed, even though the file system being displayed has more. Even with the broken scrollbars, one can force scrolling using the arrow keys, but this stops at some point, leaving additional files and folders invisible and unreachable.

A screen snapshot is enclosed showing the overlapped scrollbar problem. (highlighted with an ellipse.)