Some user report that the cache have problem on zhwp.
They submit the edit. However, when the page load, it still show the old version of the page. In the past, only IP will have this problem. But now, all user have this problem. They need to use ?action=purge to fix it. If this does not fix, some user may think the edit cannot be submit.
Is this a recent changes on the setting of Wikimedia Wikis or it is related to the 1.17 upgrade? Also, see local discussion at