It appears* that removing Wiki status, then adding it again, only generates a Mod Removes Wiki revision history entry.
* I removed, edited, then re-added community wiki status to that post.
One would expect a subsequent Post Made Community Wiki revision, but this does not appear.
Perhaps a "made wiki" entry is only ever added once. Who knows - there is quite a long history of weirdness with CW revision history entries.
Why does it continue to show and behave as Community Wiki, even though a moderator removed its status?
It was made Community Wiki again, but that action does not show in the revision history.