The straps are interchangeable @Pc5200
My suggestion would be to reverse them. This way you will be able to determine if the problem is on the strap, or the Sense.
Then we will know what needs replacing.
Hi, @Pc5200, if your problem persists go to "Contact Support", depending on where you are you should see a tile "Broken Band" where you can take their matter forward.
Cheers
Gr4ndp4 | UK
AWAKE! for morning in the bowl of light has cast the stone that set the stars to flight.