AFAIK: Places where the small progress bar should work with windows standard mode: Only the path panel (where breadcrumb panel is)
Not reproduceable:
1) The small progress bar was also opened two times on a very short right click in the file panel. (could only reproduce the second time - never a third time) - just a request to check code if this could happen
Reproduceable:
2) If I click on the path and move the mouse outside of its focus the small progress bar still continues even if i release the right mouse button.
3) If I release the right dragged mouse on the sorting header then the progress forever shows the 100% state after it competes
4) With breadcrumbs: If I start rightclick on the path and then drag it to a breadcrumb name, then the directory list is opened !and also the Breadcrumb menu. (I can select an entry in the dirlist and afterwards an entry in the breadcrumb)
Very funny to play around with it.

BTW: I would like to change the color.