it's not really a bad thing per se but the latest chapter (ch 59) is kinda weird because if you notice there's a lot of blank faces when before the author usually still add eyes and vague features so we can see the emotions and if you also reread it back i think zeppar (pink hair dude) looks different in this latest chapter too! Maybe because he's not smiling? I'm not sure but he looks different. Sihyeon was also drawn mostly facing sideways in this chapter. Maybe the original artist is sick or it's just the chapter. I hope it doesn't continue to be like this. I don't want to see blank faces all the time. The earlier chapters looks more detailed for me.

the art changed :(