Photos added with dive app don't show in web

I've added a couple of photo's to my dive log in the dive app. Unfortunately these don't appear in the web browser. 
If I add photo's via the web, they show up in both the web and the app.
All other data gets synced instantly and in both directions.

Just to be clear: the images don't show up at all. It says: "Click to add photos to your activity."