Waiting Room does not work for guests using Meeting ID

Good day, 

I am having issues with my waiting room not working, when a guest uses my Meeting ID. They can input the code and they get the "Waiting for the Host to let you in" message, but I never see them appear in the Waiting Room. 

I have verified that the settings are toggled on in the web settings and I cannot find a reason for this to have stopped working suddenly. 

 Thank you in advance.