You're always going to have a problem with the watch out of doors. The only possible resolution is to wear the watch on the side that the headphone's receiver is. Left side-left wrist. Right side-right wrist. I gave up and only pair to my phone outdoors.Hi, I have Apple Watch 2 and use the same headphones you mentioned.
Did you get the problem resolved, as my watch is doing the same thing.
Thanks
Andy