After the recent change in the review queue workflows, the "First questions" and "First answers" review queues have four options: "Looks OK", "Edit", "Share feedback", and "Other action". The last option, "Other action", is automatically selected when the reviewer takes an action on the post, such as voting or commenting on it. In the "First answers" queue, the description of the "Other action" review option is (emphasis mine)
You have taken one or more actions on this question and have finished your review.
as can be seen in the screenshot at the end of this question. In the "First answers" queue, this description should say this answer instead of this question.