onMessageReceived sometimes unable to update class property

[nurettin]

I connect the consumer's "MessageReceived" event to a class method

           addlistener(obj.consumer,'MessageReceived',@obj.on_rabbitmq_message_received)

Then I use the class method to update a class property whenever a message is received.

        function on_rabbitmq_message_received(obj, ~, message)
            json = jsondecode(message.message);
            if isfield(json, 'positions')                
                obj.positionsTable = struct2table(json.positions);
                % disp(obj.positionsTable);
            end
        end

I have a loop which calls disp(obj.positionsTable). If I receive a message while trying to display the table, the table isn't updated. I have to send message twice to get it updated.

Am I misunderstanding how the listener works? Or is there a way to lock the table in order to replace its value?