HRM dual connected but watch not reading from it

I have the Instinct 2 and an HRM-Dual.  I have paired the two devices and have confirmed in the watch that it is connected.  However the watch does not appear to be reading from the chest strap at all.  I have confirmed through a separate app that the HRM-Dual is working and is accurate to my actual heart rate.  I've also confirmed that the watch is not displaying what the HRM is reading.

Thanks for any help.