Responses
I can't say for sure....but as far as I have seen it is actually done by the official uploading app(I have only seen it in the mangas uploaded by coolmic)....I think they do it to like upload more chapters compared to the original amount of chapters(getting more money)....
https://www.mangago.zone/read-manga/reincarnated_into_demon_king_evelogia_s_world/uu/br_chapter-210609/pg-1/
An example....this chapter is like normal manga whereas the other chaps are like Korean manhwa format
Is there a specific name for Japanese manga that uses Korean manhwa format?
here is an example below:
https://www.mangago.zone/read-manga/trying_to_break_up_with_sex/uu/to_chapter-4/pg-1/