Audio stops when wifi goes away or is unavailable

I’m new to all of this but I’m having an issue - I’m trying to make it so that I can use the Pi OFFLINE with a downloaded playlist on my mobile. My mobile device plays the music, sends over bluetooth to the pi (running balena) and the Pi is plugged into a speaker via 3.5mm jack. However if I don’t have wifi available it suddenly stops playing? Why is this?

Here is the guide I followed, and it works great! (As long as wifi is available)

Hi! Thanks for reaching out, if you haven’t already as a first instance it may be useful to use the variables SOUND_DISABLE_SPOTIFY and SOUND_DISABLE_AIRPLAY to be certain it isn’t playing over wifi. I have to admit running balenaSound offline isn’t something I’ve done personally so I’m going to give it a try too.

Let me know what you find when you do get a chance to try it.
As for disabling Spotify and Airplay: Where would I do that? When I’m configuring the build? Or can I do it on an instance that’s already up and running?