Zoom Breakout Room Preassign is not working

Now I am using meeting’s breakout room using pre-assign feature. I assigned participants with their emails. But all participants didn’t assigned to corresponding rooms. The host saw only them us as unassigned users. I have already tried and created meeting with manual and API. Could you help?

In API, I am using JWT token.

Hey @iceli,

Thank you for reaching out to the Zoom Developer Forum. Can you clarify how you’re pre assigning users? Any steps to reproduce the issue would be helpful too.