Yes this is expected behaviour, traffic is bridged to the lan port of the AP tagged with the VLAN, if that does not exist it cannot reach its gateway so no traffic will be possible. After a while the client does a DHCP renew and then it works again. Do you need different vlan per building due to size or links between? If not make it in 1 VLAN, if yes use layer3 roaming or use a MX as a WiFi concentrator.
... View more