Blackwire 710 sending two Mute events for each single pressing?

For Plantronics Blackwire 710 device, we receive 2 mute events for each single press on the Mute button. Have you seen this before? In our code, for each mute button event, we toggle the mute state on the device. So 2 mute events means we toggle the mute state twice. This will end up with the device’s mute state has the same state as the state before the mute pressing. I used a timer to count the mute events and only toggle the mute state by receiving one or two events. This seems working fine. But I just wondering if this is the nature of the device.

Thanks!