Problem on a guest connection over VPN

[semneo]

I confirm this bug has not already been reported

[ x] I have searched the issues and this bug has not been reported previously

Describe the bug

Hello everyone, I'm experiencing some issues with the connection on guest machines: until now, even when connecting via VPN, there was no problem, everything worked fine. However, now if I connect with the VPN active, I must disable the internal firewall of the VPN; otherwise, the VM does not connect to the internet. As a newbie, I wanted to ask if something has changed in the latest updates or if I am doing something wrong. I should note that the installed system on the guest machine makes no difference... Thanks.

Host arch linux
VPN NordVpn