I am having weird issues with my ftp. Using a major reliable local hosting provider, never had problems before with dozens of websites with them. I already raised a ticket there too to investigate.
After connecting and initiating transfer, the server will gradually slow down in transfer speeds down to 0. Then it will disconnect. This happens immediately with first file transferred or after N files. It will also happen when connection is idle (despite keepalive or occasional uploads a minute apart).
Tried SFTP, FTP+SSL, the difference is mostly in error code despite same behavior. Sometimes there is error code 3 permission denied, which makes no sense at all :)
Session log attached.
thank you for any ideas,