Cannot delete/rename folder in explorer

Tested with Virtual Box 3.1.2 and ReactOS 0.4.3.
For demonstrating:

• create folder "1"
• create folder "2"
• create document "a.txt" and "b.txt" at folder "1"
• select files "a.txt" and "b.txt"
• drag and drop them into folder "2"
• drag and drop them back into folder "1"
  After these actions I cannot rename or delete folder "2" until reboot.