No longer pairing with Aftershokz headphones

Hey,

My Fenix 6 was pairing fine with my Aftershokz Bluetooth headphones.  

I've tried it again this week, and it no longer connects.  I removed the device, and tried again, but it won't even pair as a new device now.  The headphones go into 'Pairing' mode OK and can pair with other devices, such as my phone.

Is this something new introduced with the latest sensor update...?