Hi,
We have a scenario where some event is updated with event.set("name", "newName") and then all other events in the view disappear and have the b-released class.
This seems to be caused either by resourceTimeRanges as true or followed by a scheduler.setTimeSpan (we use it to switch between different timeslots), unfortunately I could not reproduce it in your examples, as we are using Angular.
I've followed the topic viewtopic.php?f=44&t=17960&p=88922&hilit=event+disappear#p88922 but could not reach any conclusion.
Do you have any hint on why this could be happening?