I think you are right I think it's the controller update that has done it..

@zakrzu None of the smaller switches are directly connected to the gateway they are routed through a couple of other managed switches and the smaller ones are usually at the edge of the network....

@zakrzu sorry my mistake controller firmware to 5.15.24.21 and then I was able to update the switch firmware which had been failing up until that point. After the four devices rebooted I could see...

@GRL This morning I upgraded my hardware controller ER605 v2.0 (fw2.3.0) and 2x ES205G v1.0 (fw1.0.3) and 1x ES205GP v1.0 (fw1.0.2) and now can see the IPs of all connected clients through these...

Watch out with these "Easy Manage" switches.. they aren't full featured. Even to the point of not being able to display or report client IP addresses to the controller....

@GRL not sure how you went installing the new firmware but mine keep failing the install... again unlike every other omada device in the network that just updates with a single click. Further regret!!