In my Cartodb map (not the map view of a dataset, but an actual "Map"), I have created custom infowindows for my points, and in Edit mode, they show up great. However, on the published map, when the user clicks on a point, an infowindow shows up that says "No data available."
Here's a screenshot of map editor:
Here's the published map: https://uwm-libraries.cartodb.com/viz/c46ab240-bbae-11e5-af70-0e787de82d45/embed_map