The "livemap" - the map you see on the website has long been problematic. I think that it's not a high priority for Waze HQ at the moment as lots of other stuff has been happening over the last few months.
The main problem with the livemap is that it is visually
out-of-date - possibly by a very large amount - and the "last updated" date has gone through periods of not changing or disappearing. However
apart from the visuals, it is, in fact as up-to-date as the client (which is updated more or less every day at the moment).
For example, if you created a new road in the editor a few days ago, it would not be visible, but you can click on the right part of the live map (if you can find it
) and the details will appear. You can also use livemap routing based on the updated details.