Well, I've installed this plugin and done a bit of testing using a test user and 3/4 clients: the web app via chrome Android and Chrome Win10, the XboxOne app, and Emby for Android. In all 4 cases: a client that is already logged in when a message is sent will receive that message upon loading any new page, but if not already logged in; upon login the message disappears from the 'saved messages' queue, while displaying nothing to the client. Tested mostly through an nginx RP with webso