Hi there, hope you're having a good day so far. 🙂
It looks like we have made a mistake on our end here, which I apologize for - WebP conversion wasn't fully disabled in our back-end. I've went ahead and disabled this for you, which should stop conversions in approx. 30 minutes time. I'm sorry for the confusion caused here!
Once 30 minutes have elapsed, please do check and ensure that the images are no longer converting.
We do strongly recommend having WebP-conversion enabled as this leads to a much faster site (which is good to balance out any delays caused by ads), but we understand that in some cases; it can negatively impact the quality of images and, ergo, impact user experience - so isn't perfect for every set-up.
Hope this helps, let me know how things are looking!
-Lilla