FTP connections not releasing after task completes

I am having issue where my web editor application makes the connection to cPanel ftp application but idles forever and never disconnects itself when file transfer is completed. I talked to web editor developer and they said cPanel is somehow keeping the connection active and alive so I am unable to kill the connection unless I completely kill the web editor or log on cpanel and kill the connect via FTP setting. Is there something or a setting that may cause cPanel to keep the FTP connection alive for so long or not dropping it when it idling for a x amount of time?