I’ve got a similar problem a couple of months ago - so had around 6 months of problem-free operation, and then it started out of blue in only one headphone. Ra

I’ve got a similar problem a couple of months ago - so had around 6 months of problem-free operation, and then it started out of blue in only one headphone. Rattling or static noise is added only to certain sounds, looks like depending on their frequency, and is very audible when noise canceling mode is on, otherwise it’s almost inaudible,