I think that could be key: when connecting... so if the Argon was connected to a wifi router at some point and this router changed config, the device will be in connecting mode.
Hence, this can work with your devices, if let's say you configured them once when you tested them for the first time (with your home router). Then you ship it to a customer, the Argon comes up, NOT in listening mode, but it will go in connecting mode (searching for your home wifi) and it will not be able to connect to it. So if the lib works in this state, you might be good to go.
Reading the docs, I hope "when the argon is connecting" maps to this device mode Looking for Internet.
I fear that if @Dan-Kouba meant this device mode instead: Connecting to the Cloud things can get... complicated.
Cheers
Gustavo.