I had a similar experience 10 days ago. I booked a hotel in France using prepaid rate and got a confirmation email. A few hours later I even received a seperate email directly from the hotel.

However the stay did not show in my upcoming stays on the website, nor in the app. I was able to retrieve it using the confirmation number and some other details, and add it to my upcoming stays in the app. This did not change anything on the website though.

Then suddenly, a few days later, it was there on the website as well. I don't know whether adding it to the app had anything to do with it, I think that just adds it locally.

So keep an eye on your bookings the coming days - it may pop up unexpectedly :-)