OPNSENSE Bridge Mode Firewall Problem?

[joseoliveirapt]

Dear Community,

I'm running OPNSENSE with 2 interfaces in bridge mode interconnecting the router and network switches.
I detected the following behavior:
I setup Alias for a computer (Windows 10) and next a rule on the firewall allowing traffic to and from that host. So far so good.
I open 2 command line windows and I start a continuous ping to the router and another to an external host.
I edit the firewall rule to reject traffic to and from that Windows 10 computer: both pings carry on but I cannot browse the Internet. If I disable and re-enable the network interface on the Windows 10 ping to router continues but ping to host (www.google.co.uk) stops. No other traffic is allowed.
If I edit the policy again allowing traffic again, ping to google resumes and normal access to the Internet is allowed.
Why pings continue to run until Windows 10 network interface is reset?

Thank you all in advance for your help.

Kind regards,
J.