Room session control

I would like to ask you about room session control.
Everybody leaves the meeting (Room name is test), the meeting seems not end actually.
When I enter the meeting again (Room name is test) , I see one or two particpants who are join before but actually they have already leave.
How can I handle it?
Thanks in advance.

We had seen reports for stalled session when not using prosody 0.11. You better upgrade it (don’t forget to fix storage config in prosody configuration).

Thank you so much for your quick response.
What I need do fix storage config in prosody configuration after updated prosody?

With prosody 0.11 it should be storage = 'memory'.

Thank you @damencho