This is likely connected to an issue Ive been reporting since they changed how notifications work.
If you open notification and event plays, then you hit back button and tap any other event, it will only ever play that first event unless you refresh the page. (Backing out subsequent times will actually only show the single event until you refresh)
My assumption is that its saving a variable from the notification (because it now has to make a decision as to whether it shows the event or goes to live feed) and not properly clearing it which is causing havoc.
I just followed steps you listed and see the same outcome.