Dear Yizhou,
We did some scruple tests that lasted even more than a week with several observatories without finding any disconnection. The cause of your problems is to be found in the connectivity that is offered to you or in the router that manages it. The browser-side connectivity is managed by the browser, the dashboard in addition to opening and closing can not do anything else, this for the design of any browser it is.
However, we are working on an automatic reconnection on the dashboard side as a work around. We’ll let you know.
All the best
Leonardo