Can't register for ILT via learning plan search/catalog widget

Summary:

If you access a learning plan via the learning plan widget, you can easily register for upcoming ILT's as expected. If you search for and add yourself to a learning plan via the search or browse (catalog) widget, no upcoming sessions display under the track.

Has this always worked this way? Is there a setting in the search/browse widget I can change to fix this? Most of our learning plans are for online only items so this has not come up in the past.