Cookie AutoDelete makes sites show “0 cookies” but still has storage for cleaned sites?

I'm using Cookie AutoDelete on Firefox on Windows (latest versions for all). I whitelisted some sites, then I clicked the yellow 'Clean' button. Looks like it worked - the Firefox "Manage Cookies and Site Data" preferences show 0 cookies for all the sites not on my whitelist - but *they are still listed* and have some amount of storage listed (from a few bytes to more than 100 MB).

How do I get Cookie AutoDelete to *completely* delete all of the stored data for non-whitelisted sites, so that Firefox no longer lists them at all?

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