I have EAP-615, EAP-610 & EAP-235 hooked up to omada controller and I am running home automation which is dependent on the client list provided by the omada controller. What I have observed is that even after the client is disconnected from the wifi the Clients list page still shows the client as connected for about more than 5 minutes after which the actual state is reflected. 

Earlier as well a similar issue was reported https://community.tp-link.com/en/business/forum/topic/238108 for which no conclusion/resolution is there. It would be very helpful if someone can point me to write configurations or tweaks