Occasionally, there is a delay. I had this happen only earlier this week.
Two guests left me reviews. I left a review for both. I could not read the reviews anywhere. In my in box, both were still showing as awaiting my review. If I clicked on the review button, it to me to a page where it read 'thank you for leaving a review for XYZ'. If I clicked, go to your reviews, it took me to the Airbnb guest landing page and logged me out as a host. Tried this many times.
The reviews eventually appeared. One after a short delay, but the other one after several hours as I was only able to see it the next day.
Maybe just a temporary technical glitch? Has this happened to anyone else?