Hello, I am having the same issue with my business. A customer attempted to write a review and it posted to his timeline instead of posting under the review tab on my business page. A couple weeks I was playing around with it and used a separate Facebook page to try to troubleshoot the issue I figured out that when I post a photo with the review it tends to post under the reviews tab on the business page, but when I don’t add a photo then it posts to my timeline instead. Today (6/10/2020) I noticed another customer posted a review without a photo and it posted. I don’t know if the problem has fixed itself. But alas, I went to my other Facebook page and made a post without a photo and it worked! I’m hoping the issue is resolved. Anyone else having better luck now?