A couple of times a road has been closed near my destination, and when I skip it and wait for Waze to rerout, it reroutes me back around to the same road.
If I were able to report the closure after I've already passed it and it's safe to do so, that wouldn't happen. This seems like a critical oversight by Waze and I've seen this reported in the past only to see Waze reply with "this is not something we can do at this time".
Seems foolish in my very humble opinion.