Published works may disappear (Don't disappear on your own!)
研I believe this has been reported several times so far.
When posted to the gallery, it is counted in the number of works and likes, but if for some unknown reason a published work disappears from the gallery, the number of works and likes also decreases. If I notice it, I can republish it from the generation history and restore it to the gallery, but if I don't notice, the data disappears within 30 days...
The cause is unknown, but timing-wise, it feels like it happens when a large number of works are processed as "unapproved" through manual review.