@TandS It is likely that something has triggered the controller to not send the full configuration, try forget EAP, re-adopt EAP and test again.

@Darren78 When a VLAN Interface is created on the controller, a corresponding profile is automatically generated. In the profile screen you can define which port is Tagged and which is Untagged,...

Dear @umutsati , You need to set it here:

@yves.remy It may be that the auto-negotiation function needs to be improved, try changing the port rate manually.

@firm It has the latest firmware upgraded ER605(UN)_V2_2.0.1 Build 20220223 , check this: https://www.tp-link.com/en/support/download/er605/#Firmware

@johnsnow88 Maybe the latest firmware version fixes it, either way, upgrading to 5.0.9 is worth a try!