folder_events_available Disables Tree Timeline Collapse

I have a tree timeline with the folder_events_available set to true. I default the labels to open but it appears that with this option enabled I can not collapse the tree nodes. It works fine when I set it back to false but then I can’t assign events to the folder level. It would be nice to see the enable events option at the json level for each node instead of at the timeline level. I would like some of the top folders to be not enabled but the sub items enabled. For example:

Driver 1 (no events)
Route A (events)
Supplier 1 (events)
Supplier 2 (events)