I don't think it's a mistake, at least not on Mangago's side; both uploads seem to be by Divatoon, while the previous uploads were by different translators. Either someone on Divatoon's side messed up, or it's intentional as a weird form of marketing
it has to be a mistake on mangagos bots as that same “chapter” was uploaded to more than 10 other mangas and manhuas. it is the exact same. if it is advertisement for divascans it is the worst way to go about it by using the same single image uploaded to multiple stories that they dont even carry or translate as they also agragate these stories from other groups to pad their library. sources looked at on mangago: https://www.mangago.me/read-manga/turning_into_a_tentacle_monster_made_me_crazier/ chapter 50
https://www.mangago.me/read-manga/zero_game/ chapter 386
https://www.mangago.me/read-manga/emperor_of_solo_play/ chapter 92
https://www.mangago.me/read-manga/false_paradise/ chapter 96
this appears to be a mistake that has infected many uploads as it is the same page as https://www.mangago.me/read-manga/i_gained_power_in_a_post_apocalyptic_world_and_became_unrivaled_in_the_real_world/ ‘s chapter 32