There is dhcp, but no ping in Vlan, why?

Question

Cisco

It costs PFsense, it has 3 physical interfaces, 2 on the intel S1200BTL motherboard, one on the expansion board. One rj-45 interface of the motherboard is assigned to wan, the interface of the expansion board is assigned to lan and vlan, everything works fine, but sometimes it stops at 1Gbps, I decided to transfer a couple of vlans to a free motherboard interface, and here is the problem, I create vlan port, I raise the dhcp server on it, and everything is fine, the devices receive ip from the pool assigned to the vlan, but for some reason there is no ping to the gateway, not to addresses on the Internet, nowhere, moreover, if this vlan is transferred on the lan port, then everything works fine, what could be the problem? Firewall has nothing to do with it. Switch for vlan targeting - cisco sg200-18. Since I am not selenium in this, I could miss important information, you can refer to the comments for an addition.