Is this the latest chapter in Japan?
If so, why does this series took a long break?
Hiroyama actually posted an update in his Fanbox a few days ago, saying that he's making progress with Priya now and that he's sorry for having people worry about him while he was able to get a break. Now there's a lot of work piled up, he's getting to them one by one.
https://www.fanbox.cc/@hiroyamahiroshi/posts/6189904
I had a feeling that he might have suffered from burnout, and he also mentioned his health has been deteriorating over the years. Really glad to see him back, and as he said at the beginning of this month's Comp Ace, "strive towards the climax of the story" (ここからクライマックスに向けて頑張ります).