Hi DarioCrivelli, thanks again for your reply. I think it should be like what you were mentioned, there might be some mistaken on the onItemUpdate handler. I've tested these day, and the web client has been idled for few hours and refresh again, it was able to display the events.

From what I understand, the LightStreamer server keeps every single data (or maybe snapshot) if the web client subscribes as COMMAND mode but not "DELETE" command. Is there is any settings that can make the server clear the data it self after certain time (eg: 5mins/30mins etc.)?

Please correct me if I am wrong. Thanks.