Sophos Web Intelligence Mac - websites stop to respond randomly

Hi, 

Recently we started to observe issues with Sophos Web Intelligence on MacOS. Websites (independent on the browser used Safari, Chrome, Firefox) stop to respond randomly,  issue is connected both to HTTP and HTTPS. When issue happens you are not able to access any website.

There are 3 workarounds that work:

1. force quit SophosWebIntelligence process(watchdog starts it again but in most cases this solves issue for some time)

2. reboot the machine on which issue is observed

3. disable web filtering (the problem is observed also on websites which are not covered by web filtering categories)

We have created ticket in support, reference no. 7068882 but until now there is no solution. 

What's strange there is completely no entries in the log, this why it's hard to find solution. 

We are using XG firewall at the gateway, however issue is observed also in different network locations with standard routers or just by using phone as hotspot, so it's not XG related.

Problem is observed on Mac Air, Pro 10.12.3 (reported on 5 of 7 machines we are using)

SAV Agent: 9.6.2 (central based)

Since there is nothing in the logs I made short video showing this: 

https://fen24-my.sharepoint.com/personal/lukasz_naumowicz_fen_pl/_layouts/15/guestaccess.aspx?docid=03df2ce5c9fc1491fbbd01dc033e0eb7e&authkey=AZAtW2mJ1T80acuFvCpxw4s 

I would appreciate any ideas what other logs from Mac could help to get this resolved?

Thanks