Not being prompted for host key when using Zoom phone number for meetings

I work as a contractor for 2 other companies.  I have a corporate registered Zoom account with both.  Had an issue earlier today where my PC froze up and I could not get back in during a meeting.  Tried to call into the meeting but it only prompted for Meeting ID and Participant ID, not for the Host Key.  So I got stuck in the waiting room. 

Why would the various list of Zoom provided phone numbers not prompt for the Host Key?  I need the Host Key prompt to be there every time (reliably).

Is there some Corporate Admin setting that could be disabled?