Not sure I follow. Normal behaviour is press play button to start the stream. Once playing this changes to a stop button. Press this and the stream stops and the play button is displayed again. The “normal” view uses play/ pause.
I don’t know. Screenshots that illustrate the issue you experience would be helpful. Those posted look fine to me. Also, you say that Live Radio playback is slow to start. That’s not my experience either. What stations are affected and are they geographically close to you?
I can provide additional screenshots if the roon folks would like, but think is straight-forward.
After some more experiments, including with different radio stations, local and non-local, the issue is there’s a lag only on the “switch zones” pop-up; the same is not apparent when pressing play from the primary UI.
This is not new behavior; I can’t ever not remember seeing this, and I’m one of the earliest users.