I haven't published much and am wondering how common it is for a manuscript to be sent out for review twice by the same journal. I submitted a manuscript to a journal a few months ago. It went out for review, two reviewers provided feedback/suggestions, my co-author and I addressed them all, and the manuscript went back to those two reviewers who provided another round of feedback. This second round of feedback was positive - reviewers noted that they felt we had adequately addressed their original comments, that the manuscript was much improved, and their second round of comments was mostly cosmetic. We addressed each comment in the second round of reviewer feedback and resubmitted (up to this point, everything seemed in line with my past experiences). However, I just checked the status of the manuscript and it now says "Reviewer invited," indicating it has gone out for an entirely new round of reviews. How common is this? Is it inappropriate to reach out to the editor of the journal for an explanation? I'd prefer that they just accept/reject at this point, rather than holding my paper hostage (hyperbolic I know).