@anime not to spoil anything, but they only had 10 episodes so they wouldn't end awkwardly in the next arc. Also, the episode count (28+10=38) suggests that it was greenlit initially with 3 cours, and these 10 episodes were a planned delayed release. So they've only started making the next seasons' episodes.

@navi I see. It's good if they have more material.

Have they announced anything regarding dates?