DFS 11.0 - Data cache
Inspect the data cache. Here you see what has been cached. You have the option to clear the cache and also send out an event to all CD servers to clear their data caches.
To invoke the event on the CD Server, you must locate the following file App_Config → Include → damforsitecore → DFS.Client.config. Open it and find the tag events. Check that the event name publish:dfsClearCache:remote is not commented out.