Asterisk Conference room issue

Currently running Asterisk 10.6.1 and Noticed an issue with a Conference call where one person is dialing in, gets the music on hold and never gets put into the conference room. Meanwhile the people already in the conference room hear the prompt that says someone joined but never actually hears that person. This issue happened on different conference bridges. Any Ideas?

I’ve had the exact same issue occur a number of times using ConfBridge. It’s embarrassing to have to explain through. What’s your diaplan look like?