I recently bought two Bose A20 headsets. I’m getting almost a warble or bubbly sound when the headset is on and inflight only. I’ve tried them both in two separate planes with the same effect. I have two slightly older Bose A20s that sound perfect. Has anyone witnessed this? At first I thought is was maybe a problem with just one but both are the same so makes me think It’s just the way they are now.