My current situation involves using Marionette in the following way:
Why did this happen?
Creating a CollectionView (or any other Marionette view) involves the view using .listenTo() to listen for events like add, remove, and reset on the collection. This means the events are not directly on the collection, but rather tracked by the view itself.
Switching to another view in the region triggers the previous view's .close() method, which in turn calls its .stopListening() method. This removes all listeners for add, remove, and reset events associated with that view.
In general, Marionette encourages creating a new view each time it is displayed in a region. This is because when a region closes its current view, the view loses all of its event listeners...
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