Topic in Shared Drafts is in a limbo publishing state for ActivityPub

No idea how relevant this is here, but I got this Invalid date too:

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What happened was that I published a regular post (no federation), then added the tag that makes our posts “federatable” (sorry), and a few minutes after I went to the admin dialog and clicked Publish.

In this case it wasn’t a restricted category, but the use of the tag that federates is restricted to Staff.