For that original issue, the classification comes down to scope.
If it’s a bug, it’s a bug within the entire ActivityPub ecosystem, and less in WriteFreely itself. That’s why I’ve classified it more as a feature request – which in this case is synonymous with “new development needed” – because WriteFreely is doing all that it can within the current limitations of other AP platforms.
I’d note that this is unlike the post slug issue you reported, which we can do something about from our end.