Got my Fenix 6s Sapphire in April and use the Backbeat fit wireless headphones. All worked perfectly for a few months. Suddenly all km audio prompts were announced with an awful whistle sound. Button press, phone notifications were similar but not so loud. Put up with this for a week assuming it was a headphone problem and then on a run the headphones just stopped working completely.
Replaced my headphones and upgraded to Backbeat 3150 and from the first use I had the same problem. Now the headphones have a slight crackle on certain tracks. I have logged a call with Garmin support, the forums were down at the time so I couldn't search for other users with the same issue. I was asked to provide a video of the issue which I did but a few weeks have gone by and I can't get any response from Garmin. I did find a thread on reddit that said known issue and to turn off audio tones which has helped but I am still left wondering if the sound on my new headphones has been impacted and if it killed the last pair.
Has anyone else experienced this?