Got onto the Dev branch, and got v. 1.1.1; but it has exactly the same issues as the other versions.
As soon as I define an MQTT Server IP, the system implodes.
If the screenshots I took upload properly, you can see where I am preparing to save the MQTT server target (am I missing the port? Is that required? I need better docs on this)
The next two screenshots show how the interface begins to freeze as the system goes off the rails (I am going to have to go back out to the garage now and hard-reset it).