X50 & Trio C60: No Trio mic in Zoom Rooms

X50 Software Version: 3.2.2-226104 & 3.2.1-224090
Trio C60 UC Software: 5.9.5.2983

I have numerous X50 systems deployed w/Trio C60s paired as controllers in Zoom Rooms mode, just he X50's mics are an option. 
I have noticed that some of these systems did not list the Trio as a mic under Audio/Video  > Audio > Audio Input. All of the X50s & Trios are configured the same. I unpaired the C60, updated the X50 to 3.2.2, rebooted the Trio and paired them again but the results were the same; no Trio mic. The Trio functions fine as a Zoom Rooms controller, just no option to be a mic.

So far the only solution that I have found (I've only done it once) is to reset X50, select Poly mode, pair the Trio and it appears as a mic. Change the provider to Zoom Rooms, pair the phone and it works as it should. 

Has anyone else had this issue? 

-James