newbie here and just registered to post on these headphones wear sensor (had the headphones for about two weeks and using them with a Samsung Note 10 plus phone)
What ive noticed with the wear sensor is that they work flawlessly the first time in the day you use the headphones ... the problem comes in when you have the headphones sitting on your head for a long period of time. There is a point where it wont work (i.e. removing headphone from your head or lifting an earcup wont pause the music neither changing any setting in the app will help). When the feature is broken, changing wear sensor settings on the app you do see the headphones acknowledging the changes - status lights turning on (if wear sensor is turned off) and status lights off (if wear sensor is turned on). If you leave the headphones unused for a period of time pick them up and use them wear sensors work again ... until some time it stops (and the cycle will continue)
Fiddling around i see the wear sensors are in the soft pads of the headphone. Try this ... with the headphones off your head (and when the feature is working) if you push either of the pads in it will mimic the headphones being on your head and will continue playing your music ... release, and it will pause play. Which makes me think the sensors get "sticky" with long periods of usage !? well that the hypothesis im going with ... a hardware flaw ... Question though is this happening for everyone or just a few of us? you need to have had a lengthy listening session to test this, listening for few minutes will have working wear sensors.