When you import files and folders in a Team Folder or a Secured Folder, the ownership of the imported files and folders isn't transfered instantly to the storage account. Google Drive can take up to 5 seconds per document or folder to transfer the ownership.
Learn more here: Add files and folders to your Team Folder
If the ownership transfer is not yet effective, you can see the button Ownership information displayed.
1. Press the Ownership information button. AODocs takes ownership of the document or folder after few seconds.
If some documents don't appear in the Google Drive interface after an import operation, your library administrator can fix this issue from the AODocs interface.