All ports on SMCI switches default are in Hybrid mode with untagged vlan membership of vlan 1. When the user tries to configure a port to belong to vlan 10 untagged(as an example), the user needs to explicitly make the switch port pvid to 10. Example in the following:

SMIS# config terminal
SMIS> vlan 10
SMIS> port g 0/1 untagged
SMIS> interface g 0/1
SMIS> switchport pvid 10

SMIS# show vlan brief (to show the vlan memberships)