This problem is definitely a bug, in Zoom Rooms for the Mac version 4.1.27694.0702, which was published on July 1, 2018.
it’s 100% reproducible.
After I create a conference, and another participant joins, I issue the command:
zCommand Call ListParticipants
And I get this result:
\*r ListParticipantsResult (status=OK):
\*r ListParticipantsResult resultInfo TotalRows: 0
Which is incorrect. It is supposed to list detail on both participants of the meeting: the Zoom Room, and the participant who has joined. I have entered a bug for this; the bug number is ZOOM-29868.
The problem did not happen in the previous Zoom Room build, Version 4.1.24665.0514, released on May 20, 2018. If you want to downgrade to this previous version, you can go to the Zoom Web portal, log in to your Zoom account, and under Zoom Rooms, select Devices, then click on the Downgrade link next to the Zoom Room.
A fix will be included the next time we push out a beta build.