how they connect?
Shitty 
First pair, 13T version, had to beg them to connect to my laptop, and solution was to kill BT on phone, restart BT on laptop, restart the aids and be patient. And after it connects to laptop, I can connect to phone. Then both connection are sturdy.
Then tried the rechargeable version. Would connect immediately, no restarts needed, I was taken away.
Then phonak audi department explained that they should definitely behave the same.
So we ordered new 13T.
In meantime R did nice. Until the moment when I had job interview and they refused to connect, then only sound but not mic, then only mic but no sound (on laptop). Very bad moment to not work.
Switched to the phone, all good.
Few tests more, and it started hiccuping, so I basically don’t know with them anymore if they’ll connect fast or not, same with the app, started having errors.
I got new 13T pair. Just tested it, behaves the same as previous battery pair. Maybe I didn’t have to restart the aids but all BTs I had to and first offer connecting to the laptop.
Once connected is fine, and starting stream and stopping on two devices still work fine (but you have to stop stream eg youtube, better said, not - if you’re first watching on laptop and start on phone, it will automatically stop laptop stream and switch to phone stream, but not the other way around).
Also, connection with the app is insanely long, 2x timeout (20 sec x2 in my case).
R version was much better, until I had it for like a week, then it started showing the same symptoms.
My conclusion - they’re in desperate need for an update. Or me for a new phone
( have samsung s8)
I don’t know how regular headphones behave with switching BT sources? Maybe there lies the answer for common BT behaviour.
Maybe BT just isn’t meant to be instantly connected to another source?
I have a feeling that if I had active streaming, then it takes some time to stops that antenna in order for it to be show on laptop to be able to connect.
Like streaming reserves the antenna and doesn’t allow any other steps.
With marvels which could be connected to only one device it was simpler, but steps were the same - kill the bt on phone, reset/scan bt on laptop, wait, connect.
Repeat the opposite if you want it connected with the phone.
Maybe someone can shed some light about how BT behaves, I think I’m missing such information in order to be able to understand this to me weird HAs behaviour.
@MDB do you know maybe?