Hi Bythebay
Mine is the same - stationary fine - on the move, bloody hopeless, for me and her, on Bluetooth. On speakers, it's hard to say, as I can't hear it clearly at speed. I have re-paired them and reversed which helmet goes to which device (1 or 2), but it's still the same. I am using Sharktooth. The intercom works fine between us, it's listening to the radio that is frustrating. I also lose the radio sometimes when I stop the bike and restart it. No amount of resetting will restore it. Some times, turning off the ignition and restarting will restore it, but this last time it hasn't.
I have disconnected the antenna and checked the screw thread for good contact, moved it all over the range of movement for no change.
I suspect the poor reception is
1 Motor or electrical interference
2 The speed volume control (although I have tried all combinations, including turning it off)
3 A loose connection, as it seems to react worse on bumpier roads.
Could be I'm clutching at straws with the last option
Bloody frustrating, "Her on the back" complaining. Especially, trying to sort it out on the move, as when you stop it improves.

By the way I find the "Instrument Select button" on mine doesn't work properly at times. I sometimes have to really give it a hard jab, to make it function. The demo, I had loaned to me, while they attended the fork problem, did exactly the same. I wonder how long, it will operate before failing.
I'm getting paranoid, as there are lots of glitches in my display panel also. The radio not working, the suspension light blinking on and off, the audio moving across bands without imput.
The Demo also stalled again for me on takeoff around a bend - it was a normal takeoff, not quick. I notified the service manager.
I feel we are the test engineers, or cannon fodder, on equipment not fully sorted.
For details on my fork leaks see "Fork Seals"