Document the "freshness" of the map data

[Former user]

This is a fantastic tool, however after I fixed some duplicate wikidata items, the changes seem to propagate relatively quickly (less than 5 minutes) but not real-time to the map. It would be nice to have some documentation on how that happens e.g. "it is cached by the browser", or "it depends on tools replication lag" or "it depends on wikidata dispatch lag", or "it depends on wikidata query service lag" "it requieres a page refresh", or whatever is the right method.

Adding it on https://meta.wikimedia.org/wiki/WikiShootMe would be enough, I am not confused, but I guess other less technical people may be. The only mention is:

A new item with that label and location will be created on Wikidata, and show up immediately on the map. But a) that wasn't true for me and b) it may not apply to changes not done through oauth?

Thank you.