Audiolink turn off function and other connectivity questions

[Hila]

I am using audiolink listening to presentation online through laptop Bluetooth

Goal is to turn off the streaming On off button of audiolink doesn't respond. Manual says press 2 seconds. 

Does anyone have an insight why trying to turn it off while it's connected to media source doesn't work?

 

Also, asking for a friend with Rondo3, Oppo A45 phone and Audio2Ear app 

Once the phone app is on, it takes over the functionality of Spotify App.  Does anyone have a known process of how to enable the functionality of media app such as Spotify again, while you have Audio2Ear app on your phone. Thanks in advance!