Plantronics Savi headset grayed-out as input in GarageBand
I am new to GarageBand and would like to record a voice-over using my Plantronics Savi 8220 headset. However, whenever I try to record after selecting the headset as the input source I get a pop-up message stating "no-input". When looking at the track recording settings, I see that the "PLT Savi" selection has a check mark next to it but it's greyed-out. Also, there is no mic volume detected. This headset supports both Bluetooth and USB connectivity options, and have the same result.
When selecting "Built-in Microphone" as the Input Device in GarageBand Audio/MIDI preferences, I can record using that mic no problem.
When looking at the System (MacOS) preferences and selecting the PLT Savi as the mic source, I can see the input level bars moving. So this headset seems fine at the OS level.
Furthermore, I can use this same Plantronics headset for other applications such as softphones and Zoom.
I've attached images of the GB UI when attempting to configure the headset vs. built-in mic.
Any suggestions to dealing with this issue would be greatly appreciated.
MacBook Pro 15″, macOS 10.14