eufyCam HomeBase ethernet connection

I just bought a eufyCam two camera and HomeBase pack (not eufycam-2).

I went through the setup with HomeBase hardwired to ethernet - completed and works OK.

I expected that once the initial setup was complete I would be able to disconnect the HomeBase from ethernet, shift it to another location, and have it communicate with both modem and cameras via wi-fi.

However, when I pull the ethernet connection the iPhone app tells me that the Homebase is offline. Am I doing something wrong, or was my expectation incorrect?

Thanks

Closed as duplicate topic, of which other topic has response.