Watching for new Files on SFTP from lookup datetime variable.

Hi All,
I have created a process to fetch only new files from SFTP server. (Atatched the code snippet).
But its creating an issue as sometime not able to fetch the FileDetails even though a new file is available based on lookup datetime variable.

Kindly look into it and please let me know if I'm doing anything wrong here.

WinSCP version used till now ==> 5.15
Updated today to 5.17.5.10414

URL referred for my process:
https://winscp.net/eng/docs/library_example_watch_for_changes

Sorry, but "But its creating an issue" is not a problem description. What issue? Do you get any error message? Can you post a session log file (if relevant)?