Yah, its obvious. I noticed that too... Buuuttt!! I reeeaaalllyyy~ love the first artist! The eyes! They look really enticing! But theeen, they were ruined by the next artist (Sorry, I'm being honest right now without considering the second artist's feelings. But seriously, i almost dropped this because of that and I'm thankful that I'm not that low to drop a manga because of its art yet i almost did) Buuuuttt thankfully the third artist made it good again!
I continued reading cause of the first artist, s i understand what you mean. Next artist wasnt that good for me, but she did a good job continuing the story and honestly it was more getting used to the new style. Third artist is good but still i prefer the first one. Loved her coloring and expressions (⌒▽⌒)

know the name of the first artist of this manga? The artstyle was incredible ( tho of course it is still good now )