Fresh 26.1.1 configuration failure with VLAN and managed switch

[ole]

I am replacing my HomeLab LAN with the latest OPNsense version on an APU4C4 and Cisco SG-200 managed switch.

In addition to the LAN (192.168.11.0/24) on igb1, I have three additional VLAN devices (User, Guest, IoT with IDs 10, 20, 30, and 192.168.{110,120,130].0/24) with igb2 as the parent. The static interface IPs are set to the .1 host in the network, and DHCP/DNSmasq is also configured for LAN and VLANS. Everything looks OK to me here.

The physical devices igb1 and igb2 go to the switch. All ports are configured as trunk ports - except for port g3, which is the access port for VLAND ID=10. My test PC is also connected to this port, but it is not receiving an IP address. When I plug the cable into port g4, I receive an IP address from the LAN network.

What is not as I expect here, and how can I narrow down the error?

All firewall rules are default.