In the top right corner “Show/Hide Left Zone”, this will show the “Inspector” view for the tracks.
Select a Instrument Track or Audio Track that is supposed to be outputting sound. Expand the “Routing” tab in the Inspector View and make sure that the output is routed to the correct destination.
It can comes from several different settings, sadly.
As it seems that some projects are not delivering sound as other do, with the exact same audio setup configuration, I would like to see, first, a screenshot of your Stereo out channel strip (in the MixConsole, with the Pre section unfolded) as it is in your Reflection V2 project, this, while playing it.
Ok so it turns out it was the routing. All channels weren’t routed at all. Bizzare. Is this due to the bluetooth disconnecting and reconnecting? Perhaps i’ll just (annoyingly) avoid using these headphones for casual couch production…
I have re-rerouted and now have sound on both projects. Thank you both so much for the help.