Hi @nuwriy
As it happens it has occurred just now.
I will PM you with a shared link.
The time: 09/14 15:58
I went into the app on my phone (it was already loaded) and it seemed to be working ok and showed my iPhone.
I then unloaded the app on my phone, loaded again and went to switch zone and no iPhone.
Went to settings >> Audio and it was again ‘enabling’ Hit enter program appeared to close - on going back into it the iPhone was back in the list of zones.