You need. Folder A, containing a subfolder B, some files (at least two) in folder A.
Try the following:
Open your browser, and go to directory A. Select a single file for operation cut (not the last one in the list). Now the associated icon should get somehow different (lighter) in contrast to the remaining ones to indicate, this file has been selected for cut.
Now the file should have been moved to the subfolder B, but another icon has become lightened (as the icon of the moved file before). Obviously, there is a missing update icon cache or drawing call in here. If you switch to another folder and back the icons are redrawn correctly.
Now let’s see, how long it may take to fix this…