File Manager dynamic loading lost when item is dragged into folder

I require the file manager to use its “branch” features, which allows me to dynamically load folder contents on demand. This is working well, except for when I drag a folder/item into a dynamic folder, before it is loaded. Once that occurs, the target folder is no longer treated as a dynamic folder, and only shows the item I dragged into it.

Has anyone run into this before, or know some work around?

I was thinking I may be able to attach to the “onAfterDrop” event and detect if the folder was dynamic, but I don’t see any property or method to use to determine what the target folder is.