
Since the manga don't have any updates recently but I was very happy to find this get posted just 11 mins ago (based from the time I saw this) and immediately clicked!! (๑•ㅂ•)و✧ I got confused for a bit since there's Vol. 5 chapter 3 posted but different content altogether ( ̄∇ ̄")

Me too - I just went with what it said on the page itself.
But if you take a look at the translated chapters:
Vol.5 Ch.2.1 to 3.2 the japanese bits on the first page always read "Ch.2 part 2" except for 2.1 in which it says "Ch.2 part 1". So is it all Ch.2?! It's a bit weird, but in this case the raws don't lie and it continues with the actual Ch.3!
Is my guess, but not sure x)

Another repost with lacking details like alternative titles & author's name
https://www.mangago.zone/read-manga/the_substitute_saint_is_doted_on_by_the_enemy_country_s_crown_prince_with_a_kiss/
Now chapters 336 & 348 makes more sense.
i saw your comment and read those chapters and wow they were being secretive af lmfaooo love that
Thank you (▰˘◡˘▰)