I don’t know what I did but now everything I read is like a full page and it is not split up anymore. (Like usually you click and boom next panel)
While reading any series on mobile version, there should be three horizontal white lines on top right. If you tap that, there comes a menu bar, and the 5th option from that menu is □multi pages. Check if you have blue ticked it. If you tap on that box □ again, it will get unmarked and you'll be able to see the single panel like before.
But I've no idea if you are using web version/PC.

There’s like this bl where this Korean guy sneaks into a big mansion but gets caught when he was watching the owner (a blonde guy) with someone else. He is also portrayed as a hamster and the other guy a lion.
https://www.mangago.me/read-manga/groan/ ?
Thank you!