When I use a watch face on always on the face disappears when I twist my wrist. The picture on it disappears and then comes back or fades out and gets bright again.
Welcone @brat1953. Switch off AOD. Enjoy the watch without. Save some Battery power. It might just be the Designers mistake. Try some other Faces. See if they have the same problem. Pixel Watch is the New Kid on the Block. Some times they have comparability issues. AOD is often one of the problem areas.