The VectorTileLayer (v 3.20) does not appear to fire the update-end event. It inherits from Layer and hence I'd expect it to. But in my app with various layer types, where the update-end handler is called for all other types, once I added a VectorTileLayer, that handler is never called. I noticed that in the API reference, the update-end event is also not listed in the events for VectorTileLayer. Is the lack of that event by design or something that needs to be fixed? If it's not going to be added, the API reference should not indicate that the type inherits from Layer.
