"Copying Twice." I don't know how much creative control she had as far as concept, etc., but are you really surprised?
Yes, the song could also have been the group's release. It's JYP. What did you expect?
Unfortunately, in general, that's how some [ or all? ] soloists' music is perceived once they begin doing their own no matter how the labels try to make it the soloists' own flavor. Or it may be [ or likely ] the labels who want to keep the groups' flavor in it to an extent, so they just decide to follow that route half-way or fully in fear of possibly losing her fans.
And there are fans whose favorite member is her and was waiting on her solo project for a very long time so they went insane once her music dropped and they were thrilled to support her regardless of the same concept.