filezilla keeps disconnecting when uploading

After restarting the sophos server the internet would resume. I have disabled IPS and my utorrent download seems to work for longer durations as compared to the time when utorrent download will choke the sophos firewall and disconnect me completely from the internet. The internet disconnects, throttles, chokes and then i have to reboot the firewall server for the internet to reconnect again. I am still struggling with the internet connectivity issue while downloading large files, both over sftp or torrents, or even on IDM.

Is there something that is completely blocking the ssh connection to a remote server or even file transfer in the firewall that i need to check or enable or create a rule? Prior to sohos i was able to file transfer and connect to the server without issues. Its only here at home where i have sophos installed. The remote server is online, and i have tried connecting to this server from work (a different location from home), and it works fine from home, i can file transfer without any issues. Two days back, i was trying to transfer files from a remote server using sftp connection through filezilla, and the entire file transfer was choppy, the connection would keep disconnecting every few seconds, and then resume transfer, this went on for couple of mins, the connecrtion would terminate and then reconnect again, and transfer would resume, but after few mins, the connection completely got disconnected, and since them i am not able to ssh to that server using putty nor through filezilla (ftp client). I have been facing a very strange issue lately. I've recently installed Sophos utm9 in my home lab, and these are my very first few weeks.

Filezilla keeps disconnecting when uploading