We recently submitted a paper to a conference. However, I just noticed that one of the collaborators have copied three paragraphs from another paper of mine, though that part is not our main contribution.
He claimed that he has written that part, and he showed his work, but he has forgotten to apply the changes to the final version. I was wondering if I should withdraw the paper to avoid getting flagged as plagiarism or I should wait until the review results are out and then make changes to the paper?