Another Nav V topic

sorry... but now i've figured out how to plot routes, i'm still struggling with the bluetooth setup.
I have a Sena 20s on my helmet, i have the nav v, and i have an android phone.
I've paired the android with the nav v and the garmin app works fine so i get live traffic updates etc. I've paired the sena 20s and the nav v and that works fine - i get navigation and phone calls through the bike.
Now the missing link in the chain is music (actually podcasts!). The Nav V will play music or podcasts which are on the nav v in the media app, but mine are not and i don't want to put them there. Mine are on my phone. The nav v won't relay music from the phone to the sena, it'll only relay calls.
So i paired the sena 20s and the android. I changed the settings on the bluetooth connection so that this connection is used for media, but not for phone - i still want that to go via the nav v.
It works - perfectly. Until you step off the bike and come back, it prefers the sena / android pairing and ignores the nav v altogether. Any ideas how to change the priorities? I suspect it's actually the 20s at fault here.
Now, this is all completely futile - i never actually listen to podcasts on the bike, i prefer riding. I never answer the phone either because i prefer riding. To top it all off i frequently ignore the satnav because i like exploring. So actually i'd be better tossing the whole lot in the bin but i like gadgets and i'd like to know they're working ok
