为什么编辑部说有些审稿人审完了，但仍未收到comments呢？

nder review状态日期更新了，状态未更新，问编辑部这是我的审稿意见快要回来了吗？编辑部回信说：“I find that some of the required reviews are completed for the manuscript. We yet to receive the comments from the agreed reviewer. Once all the comments are in, the editor will render decision.”

为什么编辑部说有些审稿人审完了，但编辑部仍未收到comments呢？