Problem with slow chat sessions views for some user

Hello
I am creating a user-level app using the Zoom API.
I am working on querying the chat session list (/chat/users/me/sessions) and querying the message list (/chat/users/me/messages) through its ID.
The problem situation is:
When I query the chat rooms of users A and B at a certain point in time, the chat session is not searched for user A. However, the same chat session is searched for user B.
After that, it takes about 2 hours for the chat session to be searched for user A as well.
Please let me know what the problem is.

In addition, the chat list query (/chat/users/me/messages) retrieves the messages of the current time accurately. This problem only occurs when using the (/chat/users/me/sessions) endpoint.