@Fae Thank you for the update , i applied the firmware and its working now, will the fix will be included in future non beta releases ?

@Fae Yes it is connected to the eth3 PoE port , if i disable the Vlan on eth1 everything works thats what the problem

@Fae Hello Fae I attached some pictures , it is configured as you said , as soon as i click apply on the eap615.1 all wlan's with vlan stop working on eap615.2 . Also in the Topology it shows that...

Hello As i already wrote in this topic: https://community.tp-link.com/en/business/forum/topic/560670?page=1 , as soon as i tag a single port on my eap615.1 , all vlans stop working on the eap615.2...

There was an firmware upgrade available today to 1.1.0 but it also has the same problem.

The Wlan`s with vlan don't get any ip so im pretty sure the tagged traffic just gets dropped on the 615.1 that is coming from 615.2 .