Missing some or even all chapters :not a bug:

[SirAron]

Some mangas i transfered with the bookmark transfrere option have no chapters on mangadex. the manga is ther but no chapters when km already has like 10 or more chapters?
are these just placeholder covers or are they not available on Mangadex.
for example (Hitsugi Katsugi no Kuro. - Kaichu Tabi no Wa ) to name one where there are no chapters even thoguht there clearely should be since even KM has them?

 

[Plykiya]

@SirAron You can check the MangaUpdates link on the manga page to see if there is a scanlation group that worked on the story. There aren't any chapters for Hitsugi Katsugi no Kuro because those chapters were done by Yen Press. MangaDex doesn't allow the uploading of official English chapters unless the publication company is defunct or if they don't sell it anymore. It's in our best interest to avoid interfering with publication companies since DMCA's aren't really conducive to a long-lasting manga aggregator :x

KissManga doesn't really care about that due to where they're hosted from and will upload it anyways.