Meeting hosting conflict

[ChicagoJohn]

We are a 12-Step group and we allow multiple meetings to use our paid login to host their individual ZOOM meetings. There are no time conflicts between meetings. However, we have had several instances when someone cannot start a ZOOM meeting because the system says "host is in another meeting" even though that prior meeting was closed properly by the person hosting using  "End meeting for all". This even happened at the first meeting of the day, at 6:30am, even though I have been told that ZOOM "clears" all these restrictions overnight. What are we doing wrong?