Are you still experiencing these connectivity problems?
I just received a new 150 today and could not get it to work. Four solid lights, would not enter BT pair mode, would not connect to PC via USB. I'm returning it tomorrow.
Now I see many people with actual "working" units are still having other issues.
I'm re-considering exchanging it for a new unit. Would you purchase an Amplifi again, given your experiences?
Also, Did you ever try deleting and reinstalling the Amplifi app to fix the connection issues?