iOS Siri Shortcuts, Using “Get File” With Dropbox

I’m trying to use Siri Shortcuts on iOS 12 to share photos using a shared Dropbox folder. I’ve written a workflow that successfully saves selected photos from the iOS Photos app (or elsewhere) to a specific folder in Dropbox. The problem I’m running into is on the other end when I attempt to write a workflow that selects all photos from this folder and saves them to iOS Photos. It appears as though the “Get File” action in Siri Shortcuts doesn’t properly retrieve all files contained in a prespecified File Path when this action is used with a Dropbox location. Instead, the action returns a mostly white JPG with the name of the referenced folder displayed in the upper left hand corner. By contrast, “Get File” actions pointed at a specific iCloud Drive File Path properly return the contents of that folder. Am I doing something wrong or is Dropbox just not compatible with iOS Files / Siri Shortcuts?

Thanks,

Ben