Missing Review Feedback

Hello, I shared four review links with my SMEs yesterday (for non-account holders). I only received feedback/edit notifications for one of the four courses.  They entered feedback in two additional courses. On their end they received a "Paula Galvin will be notified" message after selecting the Post button.  We logged in to the courses today and there is no feedback on display. We entered gobbledygook feedback to test this morning - and it worked.  There seems to have been a feedback black hole yesterday afternoon.  Is there any way to retrieve their comments?  Thank you.