I can confirm the issue. I am really shocked to see it, that as soon as the browser is closed, the program seems to have lost response. This is quite alarming. I am sorry that the issue wasn’t discovered during testing because we’ve always had the browser or app open. Now the issue can be reproduced we are trying to figure out the solution. It looks like this either has to do with the usleep introduced in the main loop, or the way non-block SOCKET is implemented. We will immediately look for solutions. Thanks.