We are in Enterprise with Portal.
I have a dashboard associated with an application that collects site photos at our various sites.
In the Dashboard I have a details panel and a list panel.
When I select a location in the list it shows the attachments in the details. Go to another and it shows those attachments.
However, if I select a location that has a large number of attachments and then select another location from the list the details will now display
Even though the media in there is good. i.e. normal .jpgs and the do show up if the one with large number of images has not been used.