Thanks for the reply.
Well, I have 2 different animations:
-one is a progress bar behind the icon/label, updated with progress percentage so it's quite static and a very convenient feature.
-the other one is a more dynamic animation, like a "scanning" animation that repeats every 1 second. It's green too and goes from left to right.
The second one seems to appear only when I drag&drop a directory to download it's content and there is already a file downloading in the queue. The "scanning" animation seems to represent the directory/files list discovery, but it doesn't stop when the download starts.
Steps to reproduce:
-drag&drop a directory to download it's content (commander view, drag&drop from right directory view to left directory, everything default except "new & updated files only" ticked, limit to 4 concurrent transfers)
-watch scan animation
-watch progress bar animation when the download starts
-drag & drop another directory
-watch the scan animation
-the scan animation is still there when the 2nd download starts, and continue...
At the time I wrote the feature request I had only seen the scan animation, not the progress bar. It might be a bug linked to my configuration or windows settings.