I would expect to see the interface for VLAN3 look something like: "vlan01.3"
Also, are you configuring the VLAN on the AP? The doco says you can.
Can you share a screenshot of the INTERFACES: DEVICES: VLAN page, please.
Also, are you configuring the VLAN on the AP? The doco says you can.
Can you share a screenshot of the INTERFACES: DEVICES: VLAN page, please.