I use the GUI Commander interface, and run SFTP protocol v5, Keepalives 5s interval dummy commands, no compression, SSH protocol v2, Blowfish cipher.
Problem: Experiencing "How has not answered for more than x seconds. Still waiting..." - On DOWNLOADS ONLY.
Randomly started having this problem. Uploads to the same remote location are not affected at all, however I have to stay where I am so I can click 'Abort' then 'Reconnect' every x seconds whenever I get a timeout so I can keep downloading a file. File size is irrelevant, I have regularly download and/or uploaded files between 1kb and over 2gb. All of them have suffered from this 'timout' problem and I have no idea what is causing it.
Server settings haven't been changed, local settings haven't been changed. It just stopped .. working, I guess.