I think it switched official publishers and I'm assuming some intern is sporadically uploading old chapter to push readers to watch the anime currently airing.
For the better part of two years there was a gap between the scanlations and the previous official publishers releases. A very kind TL finally went in and filled the gap right before the anime released.
Overall it's a great series and my most anticipated show this season. It might be slated as some sort of Japan tourism advert, but that doesn't make it any less enjoyable to me. Marie is so adorable dopey in the first ep, I was grinning most of the show.