OS: Windows 10 64 bit
To reproduce:
1. Enter the folder with many subfolders
2. Click any item in the folder tree
3. Use Down key to switch to next subfolders...
Actual behaviour (bug): If you reach the bottom of the panel, focus is lost, auto-scroll doesn't work.

Expected behaviour: Auto-scroll to display actual item should be used, as in Explorer or other programs.
BTW It works good in Categories Filter and Info Properties, EXIF and ExifTool.