Fishman Loudbox Performer w. Bluetooth

Okay so I’ve had this amplifier for a week and overall I like it. I find it a little light on bass but then I’m using it mainly for harmonica and I don’t think it was really designed for that instrument, few are and the ones specifically designed for harmonica can’t really cope with vocals so we use pedals specifically designed for harps to hopefully get something close to the sound us harp players seek, it’s kind of a holy grail. Anyway having said all of that this amp is clean, a little too clean, it’s loud, I love that because I’m normally fighting other band members for sound. I’ve had to adjust my style of play as it picks up individual notes really well and any mistakes are glaring. I won’t go through the effects available because as I said, harp players buy dedicated pedals and mics to get to their particular sound nirvana. All in all I really like the amp, not massively heavy and no concerns about broken valves during transportation which is a blessing, two channels make it easy for me to play, let’s be honest, strum a guitar whilst blowing or drawing, everything else works very well and I’ve used it now for a couple of small gigs with just one complaint. My complaint is, and it’s a big one ! What the devil is wrong with the Bluetooth ? No trouble connecting to anything I’ve tried to connect to but what is that horrible whine and tapping noise that’s going on in the background when playing backing tracks ! On my particular amp it is so bad I’ve given up and now use the Aux connector to connect stuff through, thank heavens it had one is all I can say or was that a deliberate design feature? This was an issue from day one, it hasn’t got any worse but £700 is a lot of money and Bluetooth was one of the major reasons I chose this particular amp over a Fender of equivalent cost and power ! Disappointed ☹️ very disappointed indeed about those very annoying noises when using Bluetooth.