Weird ClamAV problem after 2.2.6 to 2.3 upgrade

[Kei]

Hello everyone,
I had to reinstall squid after 2.2.6 to 2.3 upgrade and I got it correctly working with squidguard again.
Unfortunately I've noticed that ClamAV is not working as before. The part when it redirects to a page showing that a virus was found, seems to be broken.
From the screenshot, you can notice that ClamAV redirects to the hostname instead of the IP address belonging to the subnetwork where the PC resides.
Also, the hostname (that I had to cover in black) appears to be slave.companyname instead of the ip address of the master.
How can I revert back this behavior, and why is he redirecting to the slave pfsense firewall?
Anyone else is having this problem?