The connection to the same host with FileZilla works correctly and it's instant. I'm attaching the log for the connection (I edited slightly to remove some host/user information). I'm having the issue with WinSCP 5.21.7 stable and also 6.0.1 beta (log taken with 5.21.7, I can repeat it with 6.0.1 if requested). I also followed this guide to no avail:Timeout detected. (control connection)
Could not retrieve directory listing
Error listing directory
Why is WinSCP not able to connect to a server, when other clients are?