Tab dissapear after drag and drop

After run intellij when I open a class in main window and next drag and drop it outside of main window to open it in another window it works fine. But when I close additional window and repeat this process new window does not open and my class dissapear from main window too. Intellij version 2020.1.1 on Windows 10

Update: It happens only when I drag and drop to a diffrent desktop.