Hi Adam, we went through your title with v18.0.2 and v18.1.2. It looks to us that when the “Next missed question” button is selected it just runs the actions in the order they are listed and then stop on the last action to fire, which would be the last incorrect question.
I added an action in the middle of the q2 .. q16 actions to set a variable as a test, and an action on the page with question 16 to display the variable. It is being set correctly, so the actions are all executing but there is nothing to make it stop on that page.
I went over this with our developer, and we think having the actions reversed (like you have starting with question 2’s button) is probably what you should do.