Question about Configuration

Hey guys,

I have a problem that is occurring to me, I will leave below my current scenario and what is happening:

I use Pi-hole with Debian in the latest version, behind it I use pfsense firewall, we have more than one unit.

In Unit A - 192.168.0.0 / 24, the rules I made for blocking Facebook are all OK, in the same way I also released them.

On Unit B - 192.168.100.0 / 24, I entered 3 addresses as released in the rule, but it is not working... they reach Unit A through the SSL VPN tunnel in pfSense.

What could be going wrong in my setup?

I have already set it to Allow from All Origins in the settings.