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1-When the drawer is clicked to open, the events Opening/Open are invoked. When closing the drawer, the events Opening (BAD)/Closed are invoked. In the end, Closing event is never called.
2-When switching the current thread culture, i.e. from "en-US" to "es-ES", the drawer does not behave correctly. Clicking on a NavigationItem will show the subitems. Clicking on it again, will apparently close it but subitems remain shown although the arrow is facing up (^).
3-Attached example does contain 4 main items with 2 subitems each. On the last main item, subitems are not shown indented, they're aligned to the left
I've attached a simple example of those issues.