Sukhendu Ghosal

When opening veracrypt always there is a transparent window bellow the original window . Not in any other app . I have used veracrypt without any problem in elementary 5.0 . I am attaching the window screenshot . I have tried with nvdia driver installed and uninstalled with no change,Tried with Virtual mechine also . any help will be appreciated , thanks in advance .

Let I have created 100 GB ancrypted Veracrypt volume . Then I have copied that to another folder or external drive . Then rename it and store anothe data inside it . Is there any problem ? If I copy same veracrypt drive (Completely Blank ,Just after creating the volume) multiple and rename it as requirements . (Images,Documets, etc) I have to memorise only one password for each volume . It take long time to create 100 Gb volume again again . So I want to use same volume .