STEPS TO REPRODUCE 1. open the second panel with "split" button in any folder 2. start QUICKLY move not the last file from one panel (where there are several files) to another without releasing the mouse button 4. the file from the panel from which the movement was started will go into renaming mode. 5. if you release the mouse button on another panel, the file will move, and in the first panel, the file following it will be renamed to the name of the previous file.