Headphones not recognized

My headset (headphones and microphone) are only recognized by the device manager some of the time when plugged into my Plugable UD-3000. I’ve set the device manager to show “Disconnected Devices” and the headset shows up only part of the time, sometimes active and sometimes not. Interestingly, the microphone will show as active, but the headphones do not. The headphones work when plugged directly into my computer (Lenovo Yoga 2 Pro). The laptop does not have a microphone jack.