From Liubomyr Oliinyk via ArcGIS blog:
Thank you for the new features. I have some trouble with displaying historical maps in storymaps.
Here is the example of the layer with the historical map from 1925 (https://lviv-center.maps.arcgis.com/home/webmap/viewer.html?webmap=b5059935e9c34c91a38a0461f0934518). It is visible if the map is open through the Map Viewer.
Once I try to add it to a storymap via map or swipe feature, all layers but a historical map appear:
This layer is not hidden. Nonetheless, it is not visible in the storymap. I tried this with various maps. The problem remains the same.
Would you have any ideas about what was done wrong? I would really appreciate your help. As we work mostly with historical content it is very important for us.