It seems it is not possible to refresh a “Display Image” item using a Dynamic Action. I've read the following post (2014) and I wonder if something changed. My use case is the following: from a lov popup item the user select a name and a dynamic action triggers, refreshing the display image element. The element is based on a parametric query fetching a blob in a table, and the parameter is the id of the person selected (:PERSON_ID). Simply the query gets not executed by the refresh action.
Replacing :PERSON_ID in the query with the correct value the fetch is working (so the problem is not related to the blob). The :PERSON_ID is updated correctly because a report based on it is refreshed at the same time. So is there something I can do to solve the problem?