I have a strange issue where spotify stops me from being able to record through google now on a nexus 5.

I use my phone + spotify in an interesting way with my car bluetooth. I have two bluetooth connections running simeltaneously (because my car only natively supports phone audio and not media audio). One is obviously the car for calls and the second is a bluetooth adapter kit for my head unit (made by GROM).

Now that google now supports voice through bluetooth in my car. When i press the mic the bluetooth audio swaps to my cars integrated system (bluetooth connection 1) and waits for input. 

Usually (when i was using google music last month) google now would do its search and start playing my music again. However when spotify is active in memory and i force a voice input into google now the audio starts to play out of bluetooth connection 1 and swaps between connection 1 and 2 not actually allowing me to say anything (seems to flood the mic). 

The only way i could make it stop wanting to play what was last played in spotify was to kill the service and then activate the google now voice prompt.

Has anyone else experienced an issue similar to this?