Connected devices - how to disconnect phone without switching off music

[Poltiser]

Plan

Premium

Country

Malta

Device

(iPhone 6, Samsung Galaxy 7, Macbook Pro mid 2015)

Operating System

(iOS 12, Android, MacosX)

My Question or Issue

When iPhone or the MacBook plays the music and all 3 devices are connected through WiFi on the home network I cannot disconnect Android from other device playing music while living for the car... WiFi switch off button is not active when other device is playing - could you change that?

I know it is minor detail but it would make me think about one this less in the morning when I hurry to work. 

Thank you in anticipation... 

Regards