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I have a WordPress multisite setup in a subdirectory configuration with the speed optimizer active only on the main site. Dynamic caching, Memcached, and automatic purge are enabled. Before version 7.7.0, changes to content in a subdirectory site appeared instantly for all users. Now, I have to manually purge the SG cache on the main site whenever copy changes are made to subdirectory pages or posts. Any recommendations on how to fix this would be greatly appreciated.